Sandy Bridge : Let the battle begin...

[TiN]

I realized that I didn't burned any hardware, didn't waste money for LN2 for a loooong time. :rofl: I think you guys are wanting me to do something, don't you?

Pile of 980x 1366 benchin? Not for me :). GTX580 killin? Not yet...SSD X25M Gen3 testing? Intel is not ready :D So what left?

Sandy Bridge appear on the horizon :plol:

So I'm started to dig into new stuff, to solder and destroy :eek:

Lurk around and see what happen, this will be long story. But not right now, I'm in progress of preparation and doing curcuit surgery. Just like in ol good times, without all that fancy LN2 iPhone overclocking p:D

Not to make this intro boring, I show you some secret photos.

http://xtremelabs.org/media/misc/resize.jpg

Preliminary information.

http://xdevs.com/kpc/sandy/ud7/socket.jpg

ASUS ROG Maximus IV Extreme and Gigabyte P67A-UD7 for Intel Sandy Bridge

This report covers two flagship boards designed to run Sandy Bridge platform from enthusiast overclocker point of view. Overclocking here means pushing system to maximum performance possible, using all available tools and tricks, but also keeping stable and robust operation modes. Few actual benchmarks were chosen, including CPU-Z max clock, SuperPI single-threaded tests, wPrime multi-threaded, and several 3Dmark versions. Also there will be short analyze of hardware components used, their usability and overall experience. I decided to put some more light into engineering efforts put into P67 motherboards, rather than make lots of benchmarks.

Configuration under tests:

Processors used:

Intel Core i7 2600K "Sandy Bridge" processor, LGA1155, ES D1 stepping.
Intel Core i7 920 "Nehalem" processor, LGA1366, Retail D0 stepping.

I've selected widely used i7 920 processor for already old but still high-end Intel platform, and latest Intel 2nd generation Core i7 with top SKU and unlocked multiplier, what is very attractive for overclockers. Unlike Intel hexacores, 2600K cost about three times less, and able to deliver very good results even on air-cooling.

Motherboards used:
ASUS Maximus IV Extreme for LGA 1155 platform, Intel P67 + NVIDIA NF200 bridge. (http://www.asus.com/product.aspx?P_ID=AoHE7iDJrYucOm0n)
Gigabyte P67A-UD7 for LGA1155, Intel P67 + NVIDIA NF200 bridge. (http://www.gigabyte.com/products/product-page.aspx?pid=3646)
ASUS P6T6 WS Revolution for LGA 1366 platform, Intel X58 + NVIDIA NF200 bridge.

As for motherboards selected - it's interesting how two high-end boards perform in various tests using same hardware setup. Workstation board with NF200 bridge was used for 1366 i7 chip.

Cooling used:
Skythe Yasya with stock fan + Nidec TA500DC 120x120x50mm 2.7A for cold air tests
Asetek Vapochill LS for subzero

For more real-:\:\:\:\:\ scenario I've just took random heatpipe-powered cooler with 120mm fan. Subzero cooling is reserved for extreme tests in upcoming extended article :).

Memory used:
Kingston HyperX DDR3 memory 2x2GB for both platforms (KHX1600C8D3K2/4GX)

Corsair Dominator GT 2x2GB sticks

Videocards used:
NVIDIA GeForce GTX 480
NVIDIA GeForce 8600GT for motherboard VRM tests
Fermi-powered videocard used to test 3D performance of new platform. Old 8600GT installed for VRM and CPU tests, to keep noise pickup and EMI from high-power videocard away from actual motherboard VRM measurements.

Storage:
HDD 160GB Samsung SATA2
Simple 7200rpm drive for booting OS, test apps storage.

Power supply:
Enermax Revolution 85+ 1250W
Solid and powerful power supply with quiet rails, just to be sure nothing limits us here.
Gigabyte Odin GT 550W
PSU for ambient tests on ASUS board.

Software configuration

MS Windows XP 32-bit
MS Windows 2008 R2 64-bit
BIOS for ASUS board - 0676
BIOS for Gigabyte one - F7A from 2011/01/11

Let me tell few words about used equipment. I wanted to learn how to overclock new platform, and how to make it stable and fastest possible, and that is mission impossible without continuous monitoring and adjusting critical parameters.

Fluke 87V True RMS DMM
Two Fluke 50 II series thermometer

http://xdevs.com/kpc/sandy/tools/lab1.jpg (http://xdevs.com/kpc/sandy/tools/lab1_big.jpg)

So Fluke DMM will serve me as checking unit, to see what is happening with system, to make some measurements and adjust settings if needed, and as a reference meter, because it have industrial-grade accuracy (0.05% for VDC, 0.2% for resistance).

Fluke thermometers used for contact measurements of heatsinks and components, with help of thermocouples of Type K and Type T. I did modifications for these 51 II meters to achieve dual channel operation, better backlight and USB data logging ability. Data captured with speed 1Hz by 500 samples bursts, and then processed using Fluke Forms 3.5 Software. Accuracy of thermometers is 0.2% + 0.3C.

http://xdevs.com/kpc/sandy/tools/tek.jpg

Tektronix 2246-1Y 100MHz 4-ch scope, precise analogue device, without sampling artifacts and approximation found in low-cost digital scopes. Oscilloscope was used for waveform capture, and noise measurements for further analyze. I will do peak-peak noise, level and timing signals measurements. This is 2+2 channel 100MHz analogue model. I use compensated 150MHz probe with internal 1:10 division and custom compensated probe for motherboards.

Logic analyzer using high-speed ALTERA Stratix FPGA - for PWM waveform observation and measurements. Logic analyzer will be used for digital measurements and digital bus capture, if needed. It's implemented via ALTERA SignalTap parametric module configured in ALTERA Stratix EP1S25 FPGA, able to analyze inputs with up to 300MHz. Logic analyzer uses Agilent 01650-61608 16-channel pod.

FLIR Thermacam B2 thermal imager

http://xdevs.com/kpc/sandy/tools/imager.jpg

Nice tool to visualize thermal effects and hot sources.
FLIR thermal imager provides help thermal analysis of DC-DC circuits in Tier 3 testing.

Host PC with DAQ (National Instruments LabVIEW VI's)
Own-made xDevs.com Neutrino ES for DC power measurements

http://xdevs.com/kpc/sandy/tools/m4e_ate.jpg (http://xdevs.com/kpc/sandy/tools/m4e_ate_big.jpg)

Host PC running NI LabVIEW collect data from my custom devices used during tests, process results and show measurements as comfortable and flexible GUI. This relates to DC power measurements and voltages monitoring for Sandy bridge platform.

My 8-channel digital logging meter was also used for adjusts.

http://xdevs.com/kpc/sandy/tools/hc1mt.jpg

Boards overview

Before we continue with tortures and benchmarks, let’s take small tour to motherboards features and details.

ASUS Maximus IV Extreme

http://xdevs.com/kpc/sandy/m4e/top.jpg (http://xdevs.com/kpc/sandy/m4e/top_big.jpg)

Color scheme is similar to other ROG series motherboards, consists of dark gray and red colors. All expansion slots for cards are PCI-Express,
four with x16 physical size (three of them have x16 routed lanes, and one x8), one x1 and last one is x4 with open side, allowing bigger cards
to be installed. NF200 is connected to second and fourth slot. Slot latches are robust big dual-side type, which are not always comfortable to use
with tight multi-GPU setups.

Board have lots of headers for fans, two near 24-pin ATX power input, two near DIMMs, two more near PLX bridge, and two above CPU power circuitry.
Total amount is eight fan connectors, so overclockers will enjoy that. All of them are 4-pin type.

http://xdevs.com/kpc/sandy/m4e/back.jpg (http://xdevs.com/kpc/sandy/m4e/back_big.jpg)

Board dimension is 305 x 269, what is called Extended ATX, so better do double check if it fit specific
enclosure. I will run everything caseless, so zero issues here.

Gigabyte P67A-UD7

http://xdevs.com/kpc/sandy/ud7/ud7_top.jpg (http://xdevs.com/kpc/sandy/ud7/ud7_top_big.jpg)

http://xdevs.com/kpc/sandy/ud7/ud7_back.jpg (http://xdevs.com/kpc/sandy/ud7/ud7_back_big.jpg)

Gigabyte board is standard ATX, 305 x 244, so it can fit most cases easy.

Unlike Maximus, P67A-UD7 have four physically full-size PCI-Express slots, one x1 slot, and pair of legacy PCI maintained by ITE hub.

There 6 fan connectors onboard, two of them 4-pin type, rest are legacy 3 pin.

Both boards are based on Intel P67 Express chipset, with four DDR3 slots, just like most P67 boards. Both are using 8-layered PCB.
Both have debug POST 80h indicator, total eight SATA ports, some including SATA3 support, Power/reset buttons and few LEDs for monitoring.

http://xdevs.com/kpc/sandy/p67_pch.jpg

Expansion connectors

http://xdevs.com/kpc/sandy/back_io.jpg (http://xdevs.com/kpc/sandy/back_io_big.jpg)

Rear I/O looks full of connectors, with nice bluish SuperSpeed USB 3.0 ports, dual GbE ports, sound, FireWire and SATA connectivity. ASUS board is on top part of image, Gigabyte - bottom. There are also CMOS clear button and remote overclocking button with featured port (vertical standing USB port). If remote OC not needed - USB port may be used just as normal one.

Circuitry analysis

Power convertors

Both boards use variety of different power DC-DC convertors. I will introduce them one by one.

CPU VCC power - this is main CPU power circuitry which provide juice for CPU cores together with integrated GPU.

ASUS Maximus IV Extreme board

http://xdevs.com/kpc/sandy/m4e/cpuvrm.jpg (http://xdevs.com/kpc/sandy/m4e/cpuvrm_big.jpg)

Based on proprietary "ASUS Extreme Engine Digi+" chipset.
Actually it uses CHIL drivers (CHL8510 (http://www.chilsemi.com/wp-content/uploads/chl8510-product-brief.pdf)) for phase control, so looks like it's CHIL PWM solution adapted for ASUS use. Convertor is built using high-frequency 8-phase design with synchronous buck topology with extensive voltage and current control. This advanced VRM is able to run at high switching frequency near 1MHz.

Each phase consists of four (one pair for high-side, second pair for low-side) Infineon mosfets in advanced metal CanPAK packages. These transistors have very low resistance in active state, thus reducing parasitic power loss and enhancing efficiency. Also metal package allows much better thermal dissipation, lowering operation temperature. There is good public illustration (http://www.irf.com/product-info/directfet/dfheatsinking.html) compared to SO-8 MOSFETs. More efficiency and better cooling mean that more power can be transferred to load without critical overheating, which is essential in case of overclocking. Such components are already seen on high-end motherboards and videocards, like Rampage III Extreme, custom-designed Fermi videocards.

Output inductors used seems like metal alloy Trio LM-68B, 0.68uH with rated current 28A per each and 1.38 mOhm DCR.

http://xdevs.com/kpc/sandy/m4e/phase.jpg

Each phase is controlled by dedicated driver in small lid-less package nearby. Drivers converting PWM signal from main power controller to driving signals for discrete MOSFETs. Using driver chips allows engineers to simplify design of high-current switching power supply by reducing length of driving signals, and adding more sophisticated control and protection circuitry to overall system. Back side of VRM covered by aluminum heatsink plate, just for better thermal.

http://xdevs.com/kpc/sandy/m4e/backplate.jpg (http://xdevs.com/kpc/sandy/m4e/backplate_big.jpg)

Power from input +12V rail decoupled in four low-esr input capacitors, 270uF 16V each. Output power plane for CPU Vcore have total bulk capacitance about 5820 uF, consisting from 6 low-esr aluminum can capacitors (820uF 3V each) and one NEC/TOKIN Proadlizer PF/A cap with 900uF 2.5V rating. These polymer capacitors help to reduce fast transient spikes and have very low ESR, about 1.5 mOhm by spec.

This voltage adjustable from BIOS, in range 0.800 to 2.155V, with 5mV step.

CPU VCCSA power

System agent is a part of Sandy Bridge CPU which controls communications, in a way like legacy northbridge did. SA is not as power hungry device as CPU cores so it take power from simple synchronous buck DC-DC based on uP6203B and pair of phases. Each phase feature NXP PH5030AL (http://www.nxp.com/acrobat_download2/other/PH5030AL.pdf) NFET and PH9025L (http://www.nxp.com/documents/data_sheet/PH9025L.pdf) for high side. Both FETs able to push more than 60A.
Input capacitor - 2 x 270uF 16V, output - two 820uF 3V caps. Each phase use small 1uH inductors for energy storage.

http://xdevs.com/kpc/sandy/m4e/auxpwr.jpg

This voltage adjustable from BIOS, in range 0.800 to 1.7V, with 6.25mV step.

CPU VCCPLL power

Phase-Locked Loop autotunes adjustable frequency source to have stable and precise clock output. It is used widely in digital systems to multiply/divide clocks, filtering and clock recovery. Its power should be as clean as possible to have highest stability achievable. PLL's don't need lots of energy so on ASUS Maximus IV Extreme it's powered by small DC-DC.

This voltage adjustable from BIOS, in range 1.200 to 2.2V, with 6.25mV step.

CPU VCCIO power

CPU internals like cores or GPU use low voltage for operation, but output signals usually driven at 1.5-1.8 or more volts, like DDR3 memory chips or PCI-Express signaling. So I/O voltage is taken externally and used as base level for external interfaces. This voltage was often called VTT/QPI, VTT/DRAM etc on previous P55 and X58 chipsets. VCCIO usually affects DRAM overclocking and memory controller performance, like in older platforms before Sandy Bridge. It's fed by quite decent 2-phase synchronous buck controlled by uPI Semiconductor uP6203B. Except the DC-DC controller, both phases use same components as main Vcore VRM. Input capacitors include two 270uF LowESR 16V and output is decoupled by 3 x 820uF (2460uF total).

http://xdevs.com/kpc/sandy/m4e/vccio.jpg (http://xdevs.com/kpc/sandy/m4e/vccio_big.jpg)

This voltage adjustable from BIOS, in range 0.800 to 1.7V, with 6.25mV step.

So there are quite a few main power sources for Sandy Bridge CPU's.

http://xdevs.com/kpc/sandy/m4e/cpupwr.jpg (http://xdevs.com/kpc/sandy/m4e/cpupwr_big.jpg)

DRAM VCC power

http://xdevs.com/kpc/sandy/m4e/mempwr.jpg

Memory sticks take power from triple phase power supply with 0.68uH coils, powered by PH7030AL + PH7030AL (http://www.nxp.com/acrobat_download2/other/PH7030AL.pdf) NFETs. Each FET can push 50+ A current. Power supply controlled by uPI uP6207. There are four input capacitors, 560uF 6.3V each, and eight 560uF 6.3v for VDIMM plane. Total decoupling capacitance for memory is near 4500uF, making DIMM voltage solid and steady.

This voltage adjustable from BIOS, in range 1.200 to 2.2V, with 6.25mV step.

NF200 power

Use single phase maintained by Richtek RT8100A. Phase feature doubled PH7030AL pair (2 FET for high-side and 2 for low-side) and 0.68uH inductor similar to those used in VDIMM, VIO and Vcore convertors.

Nice feature present on ASUS Maximus IV Extreme - power disabled by hardware for NF200, so it will not produce any heat air when not used. Until you put PCI-E card into second or fourth PCI-Express slot - it's totally disabled.

This voltage adjustable from BIOS, in range 1.1925 to 1.5105V, with 13.25mV step. Standard voltage level for NF200 is 1.2 V.

http://xdevs.com/kpc/sandy/m4e/pchpwr.jpg (http://xdevs.com/kpc/sandy/m4e/pchpwr_big.jpg)

PCH power and PCH PLL

Similar to CPU PLL, but used for clock conversion in PCH.
Use two RT8100A-based single-phase convertors, with pair of 4800AGM N-channel FETs in SO8 package. No need for insane power here.
Inductors used in both convertors are 2.2uH.

PCH and PCH PLL voltages adjustable from BIOS, in range 0.80825 to 1.70925V, with 13.25mV step.

PLX Bridge PEX8608 uses APM7120 controller for its power. In rest it's same as PCH power power solution. There is pair of 560uF bulk caps for decoupling near by. It's voltage not adjustable from BIOS.

http://xdevs.com/kpc/sandy/m4e/brplx.jpg (http://xdevs.com/kpc/sandy/m4e/brplx_big.jpg)

Extra onboard controllers, like integrated sound-card, Super I/O chip, Ethernet chips, SAS/SATA, USB controllers usually need small amount of power, so they fed by simple linear low-drop regulators (LDO's) similar to LM1117. Output voltages usually vary from 1.2 to 3.3V.

Add-on ports and controllers

Both boards have USB 3.0 NEC hub, well known already by P55/X58 boards with SuperSpeed ports.

http://xdevs.com/kpc/sandy/m4e/usb_nec.jpg

ASUS also choose to use quad-port VIA VL810 (http://www.via.com.tw/en/resources/pressroom/pressrelease.jsp?press_release_no=4367) hub switch made with 80nm node tech process.

http://xdevs.com/kpc/sandy/m4e/usb_br.jpg

Let's switch to Gigabyte high-end motherboard for Core i7 2000 series CPU.

Vcore

http://xdevs.com/kpc/sandy/ud7/cpu_vrm.jpg (http://xdevs.com/kpc/sandy/ud7/cpu_vrm_big.jpg)

Main VRM covered under nice-looking heatsink with "7" labeling. UD5 have blue decoration and "5" :). I like the design of new P67A boards, they look much more high-end than previous cyan boards.

http://xdevs.com/kpc/sandy/ud7/ud7_mvrm.jpg (http://xdevs.com/kpc/sandy/ud7/ud7_mvrm_big.jpg)

Lots of inductor coils. Lots. 24 of them. Looks great, but none of consumer PWM power controller support 24 phase operation directly. Most advanced devices, like Volterra 1185MF able to control 10 phases. So we have here phase split, when one PWM channel used to control more than one physical buck circuitry. By simple calculation we get here 6-channel PWM topology.
6 real phases * 2 (double) * 2 more = needed "24" phase. But if you add something at one side, it's always a sacrifice in something other. Let me show schematic view, where topology will look like this:

http://xdevs.com/kpc/sandy/ud7/vcore.png

There is no technical need to make such complex system. Having more phases does not mean that CPU will get more power. Multi-phase systems made because it's simpler to spread big high-current load to separate nodes, so each node converts only part of whole power needed. But having too much nodes may lead to excessive noise and voltage deviation, because it's more difficult to control many nodes with high-speed PWM channels. As in general it's better to have some golden middle solution.

So Vcore for CPU is controlled by Intersil ISL6366 (http://www.intersil.com/data/fn/fn6964.pdf) chip. PWM signals go to frequency divider (small chips with 5 pins each side, labeled 617C FLBK). Frequency divider takes input signal, in our case 1000kHz from ISL6366 PWM channel and make two output signals with half frequency (inverted+normal). Then these two outputs are divided again by two more frequency dividers, whose outputs are finally drive DMOS chips at 1/4th frequency of original input PWM signal, 250kHz in out case. Each DMOS chip is a hybrid IC with two MOSFETs and their driver. So each PWM channel from ISL6366 flow thru three dividers to reach MOSFET gates. Frequency is always 1/4 of PWM phase. So with such unit it's impossible to archieve fast rate 1MHz, as on "true" multi-phase PWM topology. DMOSes used are Vishay SiC769CD, each rated to 35A.

So looks like customer pays his dollars for lots of inductors, power chips, passives just to have nice looking thing, but not for actual performance. We will check if this statement true or false during practical test.

http://xdevs.com/kpc/sandy/ud7/drmosback.jpg (http://xdevs.com/kpc/sandy/ud7/drmosback_big.jpg)

Quite crazy to make such a complex topology, if you ask me :).

http://xdevs.com/kpc/sandy/ud7/cpupwm.jpg (http://xdevs.com/kpc/sandy/ud7/cpu_vrm_big.jpg)

Voltage adjustable from BIOS, in range 0.750 to 1.700V, with 5mV step. 1.7V may be too low for real extreme guys.

CPU PLL power

CPU PLL voltage is adjustable in range 1.52 to 2.52V, with 20mV step.

System agent power

SA Voltage is adjustable, in range 0.655 to 1.305V, with 10mV step.

DRAM power

ISL6322G does work for powering memory sticks. It have dual phases to convert power, each with Renesas µPA2726UT1A (http://www2.renesas.com/maps_download/pdf/G18299EJ1V0DS00.pdf) FETs. Nothing interesting else to say about, this PWM chip is already known by other Gigabyte boards and high-end videocards.

http://xdevs.com/kpc/sandy/ud7/mempwm.jpg (http://xdevs.com/kpc/sandy/ud7/mempwm_big.jpg)

This voltage is adjustable under name DRAM Voltage, in range 0.9 to 2.6V, with 20mV step.

For VIO power UD7 uses similar ISL6322 paired with two phases. Mosfets in each phase are Renesas µPA2726UT1A (http://www2.renesas.com/maps_download/pdf/G18299EJ1V0DS00.pdf). Each FET can push 20A.
Input capacitance is 2 x 270uF 16V, output is decoupled by three 560uF, total 1680uF.

In Gigabyte's BIOS this voltage is adjustable under name QPI/Vtt Voltage, in range 0.8 to 1.7V, with 20mV step.

Also NF200 power placed nearby, controlled by simple 8-pin PWM Controller ISL6545 and single phase with pair of same µPA2726UT1A.
Output decoupled by three 560uF LowESR caps.

http://xdevs.com/kpc/sandy/ud7/ud7_nf200_io.jpg

PCH power is maintained by simple PWM controller, maybe ISL6545, hidden under CMOS battery holder, with two Renesas FETs and few 560uF caps. Had no need to desolder battery holder to read PWM marking.

http://xdevs.com/kpc/sandy/ud7/ud7_aux_pwr.jpg

In BIOS this voltage is adjustable under name PCH Core Voltage, in range 0.84 to 1.94V, with 20mV step.

Features

I think most reviewers already covered widely known things about new platforms, so just stop by on most interesting things.

ASUS Maximus IV Extreme

Board have PCI-Express Gen2 differential buffer IDT 9D403DGLF (http://www.idt.com/products/getdoc.cfm?docid=18700160) to drive down-stream PCI-Express cards.

http://xdevs.com/kpc/sandy/m4e/nf200.jpg

Well known NVIDIA NF200/BR04 bridge used to add two more PCI-E slots to Sandy Bridge platform.

NF200 and CPU VRM circuitry cooled by single heatsink assembly. Cooling solution is low-profile and aligned well.

http://xdevs.com/kpc/sandy/m4e/nf200_hsf_m4e.jpg

Overclockers like buttons for power and reset onboard. Also voltage check points are useful during extreme testing and for controls. Just a note here - fine-pitch connectors for monitoring cables is not a solution for most of guys, MSI ones for regular DMM probe are much better in term of usability.

LN2_Mode switch will allow easier overclocks under subzero by idea, but seems doesn't work actually on Sandy Bridge CPU's.

There also cool PCI-Express disable switches, to power down PCI-E card installed in selected slot. We saw similar idea
on Classified high-end boards. Should be nice feature for those who push hard 2-way/3-way SLI/CF rigs. GO_BUTTON loads profile from BIOS on-fly.

http://xdevs.com/kpc/sandy/m4e/ocblock.jpg (http://xdevs.com/kpc/sandy/m4e/ocblock_big.jpg)

Some iROG controller which does something useful for enthusiasts. It has NOR flash chip near to store some data, maybe OC profiles etc.

http://xdevs.com/kpc/sandy/m4e/irog.jpg

Maximus equipped with two BIOS SPI Flash chips. I like also LED which show currently selected and used BIOS. Visible and usable.

http://xdevs.com/kpc/sandy/m4e/bioses.jpg (http://xdevs.com/kpc/sandy/m4e/bioses_big.jpg)

Overall platform view with cooling installed:

http://xdevs.com/kpc/sandy/m4e/platform_m4e.jpg

Gigabyte P67A-UD7

Marking with 8 layers of copper stack up.

http://xdevs.com/kpc/sandy/ud7/pcb8l.jpg

Passive heatsink have nice look and does its job just ok.

http://xdevs.com/kpc/sandy/ud7/pch_hs.jpg

PCH area crowded by lots of 0402 resistors, capacitors and discretes. PCH chip does not have any visible from top "bridges" or straps to solder on :).

http://xdevs.com/kpc/sandy/ud7/ud7_pch.jpg (http://xdevs.com/kpc/sandy/ud7/ud7_pch_big.jpg)

Same as ASUS board, here is used Foxconn socket. Time will show if socket burns affect 1155 platform.

http://xdevs.com/kpc/sandy/ud7/ud7_socket.jpg (http://xdevs.com/kpc/sandy/ud7/ud7_socket_big.jpg)

UD7 have two PCI-Express Gen2 differential buffers IDT 9D403DGLF (http://www.idt.com/products/getdoc.cfm?docid=18700160) which take source clock and drive to PCI-Express down-stream devices.

http://xdevs.com/kpc/sandy/ud7/pegpll.jpg

PCI-Express slots use NF200 even if not connected to, so it's always heating here. Slots locks are comfortable and easy to use, much better that ASUS big ones.

http://xdevs.com/kpc/sandy/ud7/pegsw.jpg

Board also have power button, reset button and clear cmos button, but no hardware monitoring points.

http://xdevs.com/kpc/sandy/ud7/pwrbtn.jpg

I guess UD9 should be black-styled :) Here we have UD7 symbol.

http://xdevs.com/kpc/sandy/ud7/ud7_logo.jpg

Now remove cooling solution and check...

http://xdevs.com/kpc/sandy/ud7/ud7_hsf_nf200.jpg

Contact area of motherboard heatsink is not as good as expected to be, mount screw placed just above NF200 die. First time I saw such a "solution" on high-end motherboard :)

Software and firmware

BIOS shots of Gigabyte and ASUS boards. ASUS used UEFI for their latest P67 boards, while GBT still use legacy well-learnt Award.

UD7:

http://xdevs.com/kpc/sandy/ud7/ud7_ams.jpg

http://xdevs.com/kpc/sandy/ud7/ud7_bios_cinfo.jpg

http://xdevs.com/kpc/sandy/ud7/ud7_bios_cpi.jpg

http://xdevs.com/kpc/sandy/ud7/ud7_bios_f7a.jpg

http://xdevs.com/kpc/sandy/ud7/ud7_bios_health.jpg

http://xdevs.com/kpc/sandy/ud7/ud7_bios_ip.jpg

http://xdevs.com/kpc/sandy/ud7/ud7_bios_timing.jpg

http://xdevs.com/kpc/sandy/ud7/ud7_bios_volts.jpg

P67A-UD7 can be controlled under proprietary EasyTune6 tool, which is as usual is not easy at all in real-life overclocking. It does not work well with all bios versions, have overwhelmed design, but lack of necessary functionality, like system voltage monitoring and controls. Controls are laggy. Pity, such issues are common for "uber-super-overclocking tools" shipped with modern motherboards. Why not to create really simple and working tool, like SetFSB/CPU-Z/Rivatuner with simple interface w/o heavy graphics, just to do the job needed, fast and easy?..

M4E:

http://xdevs.com/kpc/sandy/m4e/bios_cpui.jpg

http://xdevs.com/kpc/sandy/m4e/bios_cpur.jpg

http://xdevs.com/kpc/sandy/m4e/bios_intro.jpg

http://xdevs.com/kpc/sandy/m4e/bios_monitor.jpg

http://xdevs.com/kpc/sandy/m4e/bios_post.jpg

http://xdevs.com/kpc/sandy/m4e/bios_utils.jpg

http://xdevs.com/kpc/sandy/m4e/bios_volts.jpg

http://xdevs.com/kpc/sandy/m4e/bios_vrm.jpg

http://xdevs.com/kpc/sandy/m4e/bios_vrm2.jpg

Maximus have similar overclocking tool too, but this one not as laggy, just need better usability, for example to have all settings on one screen section, not that countless folders in folders in submenus with only two-three settings in each :).

Benchmarking

Tier 1 : The Beginning

First to do - assemble test system and check if everything run smoothly and stable.

Start from CPU cooler install.

Clearance check for not the biggest cooling solution - Scythe Yasya in horizontal position.

On both boards cooler block nearest to CPU socket memory slot for any module with high heatsinks.
Even Dominator GT installed to second slot from socket with their accurate heatsinks was very close to touching
CPU cooler on ASUS board, and failed to fit with Gigabyte P67A-UD7.

http://xdevs.com/kpc/sandy/ram_clearence_m4e.jpg

Almost touched.

http://xdevs.com/kpc/sandy/ram_clearence_ud7.jpg

Fail to fit.

Of course it's not only motherboard design issue, but rather memory vendor stuff. Nice fancy heatsinks on
DDR3 stick are not for cooling, but for cool looking. Power output is so low for modern memory that it's not an issue
at all. And most extreme guys who cool memory to subzero are anyway don't care about awesomeness of stock
heatsinks on memory.

After assemble both boards boot and fully functional. Gigabyte P67A-UD7 had some issues with
Gigabyte PSU, I tried to use Odin GT 550W for some preliminary use, but board didn't even power on. Instant
shutdown when I press Power button. System doesn't power on even with everything disconnected.
Same PSU works okay with rest of my rigs, including Gigabyte P965-DQ6, ASUS P6T6, Maximus IV Extreme.
Maybe it's just exact PSU/mobo combo issue, but it was fun to have GBT PSU not working with GBT board.

2nd test - monitoring accuracy for voltages

Interesting part here. I will check all the voltages with Fluke 87V DMM and compare that to BIOS/Software
monitoring readout. For both boards I've set next settings from BIOS setup:

ASUS M4E - BIOS version 0676 x64 from 01/07/2011, EC: GMEB-0020, ME: 7.0.1.1141


BCLK/PCIE Frequency: 100.3
Turbo Ratio: 52
Internal PLL Overvoltage: EN
Memory Frequency: DDR3-1857MHz
EPU: Disabled
CPU Manual Voltage: 1.500
DRAM Voltage: 1.65V
Rest voltages left Auto
Spread Spectrum: DIS

Digi+ VRM Control:

Vcore PWM mode: Extreme
Vcore MOS volt. Control: Auto
Vcore LLC: 75%
Vcore Freq: Manual, 500kHz
Vcore Phase control: Extreme
Vcore OCP: DIS
VRM OTP: DIS
Rest convertor settings left Auto, Full Phase Control everywhere set EN

CPU settings:

Ratio: 34
Intel TM: DIS
HT: EN
Active cores: ALL
SpeedStep Tech: EN
Turbo: EN
C1E, C3 Report, C6 Report: DIS

All onboard devices disabled.


Gigabyte UD7 - BIOS version F7a from 01/07/2011


BCLK/DMI/PCIE Frequency: 100.3 MHz
Turbo Ratio: 52
Internal PLL Overvoltage: EN
Memory Frequency (SPD multiplier): DDR3-1857MHz (16.00)
EPU: Disabled
CPU Manual Voltage: 1.500
DRAM Voltage: 1.65V
Rest voltages left Auto
Spread Spectrum: DIS

Digi+ VRM Control:

Vcore PWM mode: Extreme
Vcore MOS volt. Control: Auto
Vcore LLC: Level 1
Vcore Freq: Manual, 500kHz
Vcore Phase control: Extreme
Vcore OCP: DIS
VRM OTP: DIS
Rest convertor settings left Auto, Full Phase Control everywhere set EN

CPU settings:

Ratio: 34
Intel TM: DIS
Turbo Power Limit (Watts) - 255
Core Current Limit (Amps) - 255
HT: EN
EIST: DIS
Active cores: ALL
SpeedStep Tech: EN
Turbo: EN
C1E, C3 Report, C6 Report: DIS

All onboard devices disabled.


CPU Vcore monitoring

Min, max and average value during idle and one cycle of SPI,wPrime,Vantage CPU and Aquamark tests according to meter.

ASUS board

LLC 75%

Average voltage photo, 1.5065V (http://xdevs.com/kpc/sandy/m4e_dmm/avg_vccp.jpg)
Maximum voltage photo, 1.5083V (http://xdevs.com/kpc/sandy/m4e_dmm/max_vccp.jpg)
Minimum voltage photo, 1.5029V (http://xdevs.com/kpc/sandy/m4e_dmm/min_vccp.jpg)

Less than 10mV delta from min to max. Nice results and precise setting.

LLC 100%

Average voltage photo, 1.5661V (http://xdevs.com/kpc/sandy/m4e_dmm/m4e_vcch_avg.jpg)
Maximum voltage photo, 1.5761V (http://xdevs.com/kpc/sandy/m4e_dmm/m4e_vcch_max.jpg)
Minimum voltage photo, 1.5606V (http://xdevs.com/kpc/sandy/m4e_dmm/m4e_vcch_min.jpg)

So max delta is about 15mV, and total voltage level is steady 60mV above BIOS 1.500 setting.

Gigabyte board

LLC Level 2

Average voltage photo, 1.5608V (http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_vcch_avg.jpg)
Maximum voltage photo, 1.5988V (http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_vcch_max.jpg)
Minimum voltage photo, 1.5523V (http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_vcch_min.jpg)

46.5mV delta from low load to high load. Average level is 56mV above BIOS settings, topping at almost 1.6V.

LLC Level 1

Average voltage photo, 1.4982V (http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_vcco_avg.jpg)
Maximum voltage photo, 1.5125V (http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_vcco_max.jpg)
Minimum voltage photo, 1.4749V (http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_vcco_min.jpg)

37mV delta, average level is quite near 1.500 V setting in BIOS.

So quite stable operation under heavy transitions from idle to 8-threaded wPrime/Vantage, I must admit.

Then monitoring rest of voltages

Main power supply rails monitoring:

http://xdevs.com/kpc/sandy/m4e_dmm/monitoring_3v3.jpghttp://xdevs.com/kpc/sandy/m4e_dmm/monitoring_5v.jpg
http://xdevs.com/kpc/sandy/m4e_dmm/monitoring_12v.jpg

+3.3, +5, +12V, measured on 24-pin ATX input power connector. Monitoring accuracy is okay for general use,
deviation is near +1%.

Rest system voltages working similar, with 1-2% accuracy. Could be better, but still these values are okay for
most users who are interested to see accurate voltages.

CPU PLL

http://xdevs.com/kpc/sandy/m4e_dmm/monitoring_cpupll.jpg

DRAM Voltage

http://xdevs.com/kpc/sandy/m4e_dmm/monitoring_dram.jpg

PCH Voltage

http://xdevs.com/kpc/sandy/m4e_dmm/monitoring_pch.jpg

PCH PLL Voltage

http://xdevs.com/kpc/sandy/m4e_dmm/monitoring_ppll.jpg

CPU VIO voltage

http://xdevs.com/kpc/sandy/m4e_dmm/monitoring_vio.jpg

System Agent voltage

http://xdevs.com/kpc/sandy/m4e_dmm/monitoring_vsa.jpg

Gigabyte board does not provide complete monitoring for user, so I'll just show BIOS settings and measured applied voltages.

BIOS settings:

http://xdevs.com/kpc/sandy/ud7/ud7_bios_vmon.jpg

DRAM Voltage

http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_dram.jpg

VIO Voltage

http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_vio.jpg

System Agent voltage

http://xdevs.com/kpc/sandy/ud7_dmm/ud7_mon_vsa.jpg

Tier 2 : Overclocking Sandy Bridge

http://xdevs.com/kpc/sandy/power_air.jpg

Lets check some BCLK clocking with reduced VCC to 1.45v and multi set to 48.

Tier 3 : Power stress test (thermals)

Maximus IV Extreme off, just on standby power, with CPU heatsink installed. NEC USB Bridge and peripheral controllers
heat up to mid-40's Celsius.

http://xdevs.com/kpc/sandy/m4e_ti/ti_board_off.jpg

Power on at 5.17GHz 1.5V. System begin to heat up. wPrime 32M started

http://xdevs.com/kpc/sandy/m4e_ti/ti_vrm_front_hsf.jpg

Thermal. With almost 5.2GHz Sandy Bridge quad core, heatsink on VRM module was in range 45 to 60C without any air-cooling
except stock low-speed fan on Scythe cooler.

http://xdevs.com/kpc/sandy/m4e_ti/ti_vrm_wprime_5177.jpg

http://xdevs.com/kpc/sandy/m4e_ti/ti_vrm_hsf_wprime.jpg

http://xdevs.com/kpc/sandy/m4e_ti/ti_smps_wprime.jpg

DC-DC convertor for USB 3.0 controllers run quite warm, above +60 C. This was always
the hottest point on motherboard during any tests and benchmarks.

http://xdevs.com/kpc/sandy/m4e_ti/ti_usb3_wprime.jpg

VDIMM power supply is dead cold, only +44. Maximum I saw during 2hrs of test - is 47 here.

http://xdevs.com/kpc/sandy/m4e_ti/ti_vdimm_vrm_wprime.jpg

IDT PCI-Express clock buffer near +50C, just 20 degrees about ambient.

http://xdevs.com/kpc/sandy/m4e_ti/ti_pll_wprime.jpg

PCH runs near +50C, without any active airflow.

http://xdevs.com/kpc/sandy/m4e_ti/ti_plx_wprime5177.jpg

PLX switch working at +50-55C. Nothing except 8600GT card installed.

http://xdevs.com/kpc/sandy/m4e_ti/ti_sio_power_wprime.jpg

Super I/O area is cool, just a small chip which drives power-hungry LEDs in debug indicator heating up a bit.

NF200 bridge totally unpowered when not used. It's temperature is same as PCB, no heat at all.

http://xdevs.com/kpc/sandy/m4e_ti/ti_nf200_disabled.jpg

I was also interested in thermals without heatsink onboard, so decreased clock to 4.5GHz and voltage to 1.35V,
just to be safe.

Idle - 50-55c for drivers, even less for mosfets. MOSFETs on center was covered with matte paste, to
get rid from metal can reflectivity. Thermal imager accurate only on non-reflective surfaces.

http://xdevs.com/kpc/sandy/m4e_ti/ti_vrmo_wprime.jpg

Coils run near 40-45C with 4.5GHz tests.

http://xdevs.com/kpc/sandy/m4e_ti/ti_vrmo_coil_wprime.jpg

Drivers produced most part of heat, running near +60C.

http://xdevs.com/kpc/sandy/m4e_ti/ti_vrmo_driver.jpg

Noise and transient testing

ASUS Vcore probe connect

http://xdevs.com/kpc/sandy/tools/cpuprobe.jpg

Shield of probe was connected to ground terminal to nearest capacitor in CPU cavity on back of motherboard, signal is VCCP terminal. For each tests below CPU was overclocked to 5.15GHz with 1.500 Vcore BIOS setting.

http://xdevs.com/kpc/sandy/m4e_osc/osc_idle.jpg

OS booted, system idle. 10-15mV range small noise, totally acceptable.

http://xdevs.com/kpc/sandy/m4e_osc/osc_pwm-pkpk.jpg

Light, SuperPI loading to CPU, noise increased to ~20mV, not noticeable actually.

http://xdevs.com/kpc/sandy/m4e_osc/osc_pwm.jpg

Small spike at running frequency of VRM, 500 kHz, observed.

http://xdevs.com/kpc/sandy/m4e_osc/osc_wprime.jpg

WPriming at 8 threads shows some increased ripple, 60-70mV max. It's okay for CPU.

http://xdevs.com/kpc/sandy/m4e_osc/osc_wprime5g.jpg

wPrime at 5GHz and 1024 test (clock is limited by thermals with air-cooling), 65-75mV range. Okay too.

http://xdevs.com/kpc/sandy/m4e_osc/osc_vantage_cpu.jpg

During Vantage CPU test VCCP is surprisingly clean, only ~30mV pk-pk ripple.

http://xdevs.com/kpc/sandy/m4e_osc/osc_nature_10us.jpg

3Dmark03 test Nature, with 8600GT card on stock clocks. below 30mV range noise.

http://xdevs.com/kpc/sandy/m4e_osc/m4e_nature_vccp.jpg

3Dmark03 test, with 480GTX on stock clocks. Never saw above 90mV.

In conclusion for CPU VRM on Maximus IV Extreme - it doing job very good. Run hotter than Gigabyte monster, but power quality is clearly better.

Overall YouTube video with M4E under noise tests:

Youtube demo during ASUS VRM testing (http://www.youtube.com/watch?v=vqqgp53p5Uo)

Gigabyte Vcore probe connect

http://xdevs.com/kpc/sandy/ud7_osc/ud7_sense.jpg

Idle, booted OS, nothing loads system

http://xdevs.com/kpc/sandy/ud7_osc/ud7_osc_idle.jpg

Quite and safe.

Light load with 5.17GHz 1.5V in BIOS, LLC lvl 1.

http://xdevs.com/kpc/sandy/ud7_osc/ud7_osc_ripple.jpg

Some 250kHz low-amplitude noise. About 10mV peak-peak.

3D06 run thru CPU tests.

http://xdevs.com/kpc/sandy/ud7_osc/ud7_osc_noise_3d06.jpg

Whole bunch of oscillations happen. Average peak-peak level is 30-70mV

http://xdevs.com/kpc/sandy/ud7_osc/ud7_osc_noise_22hz.jpg

..with frequencies 22, 900Hz, few kHz.

http://xdevs.com/kpc/sandy/ud7_osc/ud7_osc_mod_900hz.jpg

With medium to high-loads there are slow and big transients. 100-115mV peak-peak.

http://xdevs.com/kpc/sandy/ud7_osc/ud7_osc_oscill.jpg

1MHz PWM1 signal added.

http://xdevs.com/kpc/sandy/ud7_osc/ud7_pwm_ns.jpg

SuperPI 1M

http://xdevs.com/kpc/sandy/ud7_osc/ud7_pwm1_ns.jpg

Thermal shots

http://xdevs.com/kpc/sandy/ud7_ti/ti_pwri.jpg

Applied stand-by power. System not working.

http://xdevs.com/kpc/sandy/ud7_ti/ti_vrm.jpg

Starting system at 5.15GHz 1.5Vcore in BIOS. There is little choke temperature gradient.

http://xdevs.com/kpc/sandy/ud7_ti/ti_cen.jpg

Same USB 3.0 heat generated even in stand-by.

http://xdevs.com/kpc/sandy/ud7_ti/ti_controllers.jpg

CPU auxilary power convertor run at about +50°C

http://xdevs.com/kpc/sandy/ud7_ti/ti_pll.jpg

ITE PCI hub comforts at 50-55 C

http://xdevs.com/kpc/sandy/ud7_ti/ti_sbc.jpg

Main VRM chokes topped at +45°C during tests.

http://xdevs.com/kpc/sandy/ud7_ti/ti_vrdc.jpg

http://xdevs.com/kpc/sandy/ud7_ti/ti_vrmpx.jpg

Back side of PCB is more interesting.

http://xdevs.com/kpc/sandy/ud7_ti/ti_bvrmt.jpg

Top row of DMOS was about +5-7 °C warmer than left side.
Looks like current not balanced equally, but can be also just less copper on plane in that area.

http://xdevs.com/kpc/sandy/ud7_ti/ti_backph.jpg

Left DMOS chips.

http://xdevs.com/kpc/sandy/ud7_ti/ti_bvrml.jpg

Max temperature registered for bottom non-cooled DMOS-es was about +55-57°C

http://xdevs.com/kpc/sandy/ud7_ti/ti_bvrm1.jpg

Actual phase PWM1 captured signals, Intersil output (top signal), After divider 1 stage (middle, 1/2 of clockrate, with 60ns delay, and after two divider stages (bottom signal, 1/4 frequency, 100ns delay)
So each divider adds noticeable delays to phase control signals. This mean that situation when more than one phase per moment can be firing, possibly raising noise level.

http://xdevs.com/kpc/sandy/ud7/phase.png (http://xdevs.com/kpc/sandy/ud7/phase_big.png)

This waveform was captured using logic analyzer sampling at 250MHz rate.

Youtube demo during Gigabyte UD7 VRM testing (http://www.youtube.com/watch?v=Dck52SM1MAM)

Power tests

-TBD-

Tier 4 : Extreme test

http://xdevs.com/kpc/sandy/tools/vapo.jpg

I didn't managed yet to gain any overclock increase with phase-change unit, with CPU evaporator temperature in range -40 to -20°C.

-TBD-

Test results from

Conclusion

ASUS ROG board and Gigabyte UD7 for Sandy Bridge processors marketed at same level as current flagship motherboard, but in real battle for benchmarks and usability ASUS solution is quite ahead. To be honest, I'm not an ASUS fan, but this time their solution works better :). Both boards are working perfect for 24/7 use, and allowed me to reach exact top level from my single D1 ES 2600K sample, but Maximus made that easier.

Actual practial comparsion of both boards in VRM performance side allow to see, that boards run similar, UD7 have overvolts more with similar LLC settings, have more noise on plane, but VRM runs cooler in general. ASUS board run have better voltage precision, much more VRM adjustable settings thru BIOS, wider voltage range. bit warmer.

I could not see any practical sense to make 24-phase VRM for LGA1155 platform. Yes, it sounds cool, but it's not the key necessary for overclocker (and never was). What is essential for overclockers - is ability to control everything, solid and stable overclocking software, useful and clear BIOS settings, and minimum of issues. Good 6/8-phase design still able to deliver necessary power, and practice shows that even Intel DP67BG is able to make 5.5GHz Sandy Bridge happiness, not matter of it's "weak" VRM.

We should wait for new revisions of Sandy Bridge boards to make final statement, but even current models able to reach much more than 5000MHz using just normal air cooler, without any subzero madness, which is just cool. I'm sure about new :\:\:\:\:\ :\:\:\:\:\:\:\ using Sandy Bridge platform, just after people learn new platform a bit.

All currents results achieved with tested motherboards and CPU listed below

Air-cooling

CPU-Z - 5241MHz, AIR! (http://valid.canardpc.com/show_oc.php?id=1594497)
SuperPI 1M - 7.219
SuperPI 32M - 6.43.635
wPrime 32M -
wPrime 1024M -


Extreme phase-change (Vapochil LS)

CPU-Z -
SuperPI 1M -
SuperPI 32M -
wPrime 32M -
wPrime 1024M -


i7 920 at 5GHz.

CPU-Z - 5302MHz (http://hwbot.org/community/submission/997611_tin_cpu_z_core_i7_920_5302.51_mhz) - LN2!
PiFast - 16.84 - 5030MHz (http://hwbot.org/community/submission/1000004_tin_pifast_core_i7_920_16.84_sec) - LN2!
SuperPI 1M - 8s422 - 4920MHz i7 930 (http://hwbot.org/community/submission/981274_tin_superpi_core_i7_930_8sec_422ms) - LN2
SuperPI 32M - 7m19s - 5036MHz (http://hwbot.org/community/submission/1000001_tin_superpi_32m_core_i7_920_7min_19sec_422ms) - LN2!

3Dmark2001 SE - 118322(with E8600 LN2 6121@ GTX 285 LN2) (http://hwbot.org/community/submission/990561_tin_3dmark2001_se_geforce_gtx_285_118322_marks)

Credits:
* [B]Peter for great support and cooperation
* cyclone for hardware and support
* k|ngp|n for doing amazing things ;)
* And many many others who put effort to OC :\:\:\:\:\

Stay tuned, keep following. TiN

Let the battle begin :D

[Cyph3r_Smurf]

I remember the first picture :)

http://kingpincooling.com/forum/showthread.php?t=889
For measuring the voltage

The second could be for measuring cpu voltage, but i'm not sure;)

[wesjuhdabomb]

Its a current meter, not voltage:) Its obvious the 8pin is 12v.

[dinos22]

oh this will be interesting :up:

[nigel]

oh this will be interesting :up:

²nd :up:

this is going to be fun.

also the wire on the backside is that to measure the PLL voltage?

[OC Maximus]

Go Tin Go!

OCM

[TiN]

http://xdevs.com/kpc/sandy/asus.jpg

&

http://xdevs.com/kpc/sandy/gbt.jpg

Thermal imaging roxx :D

[dinos22]

lol you got a thermal imaging camera wow sweet :D

[nigel]

lol you got a thermal imaging camera wow sweet :D

what he said:clap:

[steponz]

thermal imaging is the shiat...

[George_o/c]

How is this thing going Tin?

[TiN]

Review posted, beta-version :) Lots of things tested, but not enough :)

Hope you will not be very strict with my efforts.

[dinos22]

Wow mate lots of testing done thanks for sharing. Pics aren't laoding on the blackberry will have to check it all out later.

Btw I'm still waiting for you to get permission from your source as you said to reveal who supplied you the UD7, I've cheched and it definitely did not come from Gigabyte. What's the history behind this board? :)

[Kal-EL]

Very nice TiN :)

[Neuromancer]

Holy Shit!

That is some sick ass reviewing there. Nicely done!

[Hondacity]

i love the pk-pk scope shot ...wooooo i thought gigabyte had a cleaner power delivery...NOT...

:D

[Shammy]

if anyone can beat that review in terms of technicalities , i'd like to read it :)
No BS, No armchair talk, straight down to business
btw the youtube link is not working.

[G H Z]

yeah that's on a completely different level than i've ever seen. Now we just need someone to figure out how to make them like cold.

[bazx]

what a read tin, well done

love the straight talking down to business way this review has been done

[chuchnit]

Wow Tin amazing!! You didn't say shit, just showed. What's up with the scope shots on the UD7?

[TiN]

Youtube for UD7 testing process fixed (http://www.youtube.com/watch?v=Dck52SM1MAM)

Btw, Intersil VRD12 PWM ISL6366 product page (http://www.intersil.com/products/deviceinfo.asp?pn=ISL6366)
Last week there was also a full datasheet available for download, but now it's just say

The ISL6366 datasheet is restricted to a very limited number of customers.

:D
I stored DS as always on local disk, so I have it :D

[Cyph3r_Smurf]

Great Work! And this is only the BETA ;) Looking forward to see the finished review!

[Shammy]

http://g.imagehost.org/0669/2_1.jpg (http://g.imagehost.org/view/0669/2_1)

2 phases overlapping like that, is that 2 phase or 1.1 phase? :D

[Raja@ASUS]

It's high time Gigabyte moved away from all this mux stuff. Intersil don't have any buck controllers that can control over 6 phases afaik. GB obviosuly buys stuff in large volumes so its made sense to have the entire line-up driven by similar components and scaled up with add on parts where either needed or deemed necessary for marketing and product differentiation.

[TiN]

Volterra is still top for me, they did their job with overall topology well. Specially latest 1185-1195 chipsets, with QFN user-friendly packages :D I'm so tempted to play with my first power VRM with them, hope next week, after some urgent work done.

[k|ngp|n]

Wow. Tinbo style review :up:

[BOBO]

@ Dino, maybe Santa Claus...

[carpo93]

Very good review man:)

[Raja@ASUS]

@ Dino, maybe Santa Claus...

hehe, most marketing guys don't like samples getting into the "wrong hands" if they can help it..LOL

[Bobnova]

This is what a motherboard review should be!

Gotta say I'm disappointed in gigabyte on this one, especially with the screw right in the middle of an NF200 die!

[Splave]

I dont know what I just read lol, I did enjoy the thermal cam !

[TiN]

Today I've connected my RAID5 array from main 24/7 rig to Gigabyte P67A-UD7, and it worked okay. That was very nervous minutes when I push power on button on UD7, but everything working okay now.

Old setup:

QX9650 + Gigabyte P965-DQ6, ICH8R in RAID mode
3x1000GB WD Black 1002FAEX in RAID 5

New setup:

2600K + Gigabyte P67A-UD7, PCH in RAID mode
same HDD array.

Worked ok, just DON'T FORGET to switch BIOS to RAID mode, with array disks UNCONNECTED. I always do like this, because gigabyte mobos love to put their BIOS backup to the end of harddisk, just where normally raid configuration information stored. Booting gigabyte mobo with SATA/IDE mode for storage was killing RAID array configuration. I did not checked if P67A boards doing same, not with my working raid5 :D
I hope guys who have empty disks for raid testing will test that.

Anyway, I want to say three things for now.

1. Migration from very old P965-based mobo with use of internal RAID functions to very latest P67A system working flawless. This is how things must be done, congratz to intel.
2. I selected UD7 because I need PCI for my audigy and my PCI development devices.
Asus just don't have PCI.
3. I'll post more real-life real-:\:\:\:\:\ usage tests in a view from 5-year LGA775 user.

Win2003 EE SP1 OS running on raid5 is same, no reinstall/etc was needed, just updated few drivers.

It's quite clear that UD7 is board more for everyday use, and M4E is for overclocking, having all that flexibility and countless adjustment possibility.

[G H Z]

UD7 appears to be the board for 01 though, and not by just a few points, it's in th3 K's. Wonder what's going on there.

[Massman]

It's quite clear that UD7 is board more for everyday use, and M4E is for overclocking, having all that flexibility and countless adjustment possibility.

Don't really understand this 'logical conclusion'. How is it 'quite clear' that UD7 is not for overclocking?

[TiN]

Massman

Keyword there - more :)
I do like both boards, but to take true - UD7 have obvious less settings and monitoring options for top-edge clocking. Let's be honest, for current 1155 Sandy Bridge CPU's - there is no noticeable (>1% in performance) difference in term of overclock result, if overclocker use Intel P67 board or cheapest possible Gigabyte or Biostar or Asrock P67 model, or most expensive UD7 or M4E. What differs - is only small things, which are making overclocking more easy (meaning here getting results faster).

To be exact, I see next:

UD7 have PCI, usual BIOS w/o fancy things, limited monitoring features (only Vcore,Vdimm and few more volts), less tuning possibility for non-vcore power curcuitry, only 1.7Vcore for CPU (yah, thats a lot already, but nobody knows the limit of 1155 CPU's of current batch, nor future CPU's. 1.8V was also overkill for Bloomfield but just the starting volts to scream for Westmere's.

M4E have no legacy port, fast and extensive BIOS (with all teh settings, just like in DFI times), so geeks can play with settings weeks long, almost total control on all main VRM, nice features like PCI-E disable (those who benched 3-way GFX all under LN2 and heavy mods, know how important to have each GFX running flawless), more space around socket.

This is not like "TiN likes M4E, and tells only shit about GBT", please. Me personally like UD7 because it have PCI. I don't want to loose my Audigy. I would like to see IDE and LPT port too for my old development stuff, but I know it's already too late for this stuff today. :) I would like to try other boards later, like Intel P67, EVGA, Foxconn, maybe some Biostar, but I have what is here, and think people would like to read some details about products not covered in ASUS or Gigabyte marketing papers.

G H Z

Thanks, I'll check that with EVGA GTX285, both boards with as close settings as possible, on same OS, same test, same clocks :).

[TiN]

http://xdevs.com/kpc/sandy/boards.gif

Animated image of socket area from both boards. 1155 Mount holes aligned together.

[Massman]

Thank you for the explanation, TiN. I understand your point of view now. For the :\:\:\:\:\:\, by no means did I want to hint towards you being biased (in the negative sense) about this.

That being said, I would like to make the argument that all P67-based mainboard reviews using overclocking capabilities in the conclusive lines are biased by the (subjective) opinion of the reviewer. This for a very simple reason: every single P67 mainboard is capable of maxing out any given Sandy Bridge CPU as long as the basic BIOS functionality is present.

You mention speed by which you can achieve a certain overclock as part of the equation to determine which board is 'better'. Well, by that logic it could very well be my MSI P67A-GD65 as I managed to run 5.4GHz within 2 minutes after unboxing the board for the very first time. Of course, I had pre-tested the CPU before and knew exactly how to set it up, so when first booting the board I just set multiplier 54x and Vcore to 1.55V.

Perhaps the only objective factor to base an overclocking capability argumentation on is the maximum BCLK frequency. Although one could instantly argue BCLK is not a data bus and therefore increasing it does not have any performance effect, it does allow people to run higher memory frequencies. I think so far, based on the results coming through HWBOT, ASUS' been able to provide much better BCLK OC results than any other manufacturer out there. The question remains, however, to what extend DDR3-2240 (105MHz and DDR3-2133 divider) will beat DDR3-2133 with subtimings tuned. I think that answer will vary a lot from case to case.

The situation is very much different from the X58 days (1st/2nd gen boards) where Classified simply stood out from the rest in terms of raw clocking power.

Besides the BCLK overclocking capabilities (which are nice in itself, I guess), the only other variable is performance. So far, I haven't seen a board that stands out though. Other than that, no reviewer could distinguish any board as being 'better' (or: 'more suited') for overclocking based on objective results. The bottleneck in overclocking/benchmarking is not the mainboard.

(which doesn't mean I don't get a kick out of your test methodology :D)

[xoqolatl]

every single P67 mainboard is capable of maxing out any given Sandy Bridge CPU as long as the basic BIOS functionality is present.

Are you basing this on any research?

I'm not saying it's not true, but I'm not saying it's true either until I see a proof or at least some statistics based on very big sample.

[Massman]

Tested one CPU of four different boards - all run the same frequency (5413MHz). Pt1t has tested a lot more boards (7/8?) with the same CPU and they all do the same frequency as well. Not the scientific/statistical proof you're looking for but there's a very clear trend here.

I could run a dbase query on the ~2K SnB results in the HWBOT dbase ...

[TiN]

every single P67 mainboard is capable of maxing out
Actually there is nothing shoking new here. Just exact as it was on P55 boards, X58 boards and older. Some boards was easier to operate, some allow more VRM tweaking, other had NF200 bridges and etc, but with reasonable effort - every one of them was able to push CPU to max. The difference is only in amount of effort needed. With EVGA 762 you will not need to worry about lack of power, BIOS features to push CPU etc, but low-end entry X58 boards could do very similar performance, just need decent VRM modifications and BIOS mods :) Classified released later then first boards, I guess, so R&D guys tuned them very well and make lot of good features, which by amount come to quality level. :) I'm sure, 2nd gen P67 boards will have much easiers and higher OC than today models.

Actually I never saw difference more than few % between different vendors too, but same chipset and same config specs. Buggy boards with firmware/hw flaws not counted ofc.

As for BCLK - M4E have features to tune skew-s, drive voltage and such tweaking for DMI bus and PCH configuration, so it may allow a bit higher BCLK OC. I had 2MHz boost with D1ES 2600K after few hours of playing with skews. I'll cover that soon too.

The bottleneck in overclocking/benchmarking is not the mainboard.
But the thing is, motherboard is useless hardware w/o CPU, and reverse :) The difference is only the ease of overclock on board A or board B. You can OC but flashing some values on some 0x45289724h addresses and SMBus bits toggling in board XXX. Or you can do that in graphical BIOS interface with meaningful values "BCLK Frequency, CPU multi etc", on board ZZZ. Both methods do actually same, toggling some bits in some registers, putting some signals to VRM,CPU,etc. :) Board YYY have only one value to control - CPU Multi, and nothing more (it still have VRM and other settings, but they are hidden from user).

But will you say that board XXX and ZZZ and YYY are same suited for OC ? ;)

Make teh queries, i'm interested. It would be great to have also BCLK/ratio query from hwbot , but that's unavailable coz hwbot dont allow ocers to put BCLK and multi for submission

[TiN]

Query'd the database for some OC results (K-sku only) (based on ~2500 entries):

AVG CPU OC (min. 10 unique users)

Average MHz | # unique overclockers | mainboard

5302 | 31 | P67A-GD65
5296 | 14 | P8P67 Evo
5296 | 31 | P8P67 Pro
5288 | 31 | P67A-UD7
5270 | 13 | P8P67
5227 | 12 | TP67XE
5210 | 31 | Maximus IV Extreme
5205 | 12 | P67A-UD5
5095 | 16 | P67A-UD4
5072 | 31 | P8P67 Deluxe

AVG MEM OC (min. 5 unique users, exclude all results >DDR3-2400)

Average MHz | # unique overclockers | mainboard

1019 | 16 | Maximus IV Extreme
983 | 19 | P8P67 Pro
975 | 6 | TP67XE
969 | 7 | P67A-UD5
959 | 16 | P67A-UD7
944 | 6 | P8P67 Evo
942 | 9 | P67A-UD4
942 | 17 | P67A-GD65
920 | 17 | P8P67 Deluxe
812 | 6 | P8P67

Interesting, but we need more overclockers :)
How did you get CPU OC quiery? Avg on CPU-Z, or avg on all results?

And strange numbers :D 31, 16-17, 6, 9 sweet spots ? :D

[Massman]

Did it the lazy way: avg(cpu_mhz) of all results.

A better way would be to exclude the CPU-Z validation rankings and to limit the weight of one user's golden cpu by only accounting the best result of a given user on a specific board. It takes a bit more time though :p.

The difference between the average results is statistically insignificant. Meaning exactly what you said in your last post: no difference between boards so far. The only difference is on the level of resulting clock-per-clock performance and so far almost all boards perform pretty much the same (except for 3DM01)

For the record, I do think the memory OC stats are significant. The M4E is currently ruling the BCLK oc charts, so it's no suprise that's the board topping the highest memory OC (which is pretty much function of the BCLK OC capabilities).

[TiN]

So, are we ready for part two? :D

UD7 F7a bios VS MIVE 0088 bios

MIVE

http://xdevs.com/kpc/sandy/test/01_m4e.png

UD7

http://xdevs.com/kpc/sandy/test/01_ud7.png

Same rig, same cooling, same volts, same everything except mboard.

Full specs:

i7 2600K ES D1
Scythe HDT cooler
2x2G Kingston DDR3
Single EVGA GeForce GTX 285 2GB with ASUS cooler and EVGA Untouchable for Vmem.
Enermax Revolution 1250+

Same Windows XP 32bit for both tests.
Lod 1.9 for all tests except nature, 4.9 for nature.

http://xdevs.com/kpc/sandy/test/01_ud7.jpg

I forgot to enable Hyperpupping but it should be no influence so much.

[TiN]

Little update.

3DMARK03 (MIVE, 2600K D1 ES, 5167MHz air, EVGA GTX 285 2GB, 2x2G Kingston DDR3, Enermax 1250W)

http://xdevs.com/kpc/sandy/test/03_285_mive_xp.PNG

3DMARK03 (UD7, 2600K D1 ES, 5167MHz air, EVGA GTX 285 2GB, 2x2G Kingston DDR3, Enermax 1250W)

http://xdevs.com/kpc/sandy/test/03_285_ud7_5166.PNG


Multi-GPU scaling on MIVE

3DMARK03 (MIVE, 2600K D2, 5518Hz LS, 2x2G Kingston DDR3, Enermax 1250W)

Single 8800GTX - 45686

http://xdevs.com/kpc/sandy/test/03_8800_single.png

Two 8800GTX SLI thru NF200 - 67908

http://xdevs.com/kpc/sandy/test/03_8800_sli.png

Two 8800GTX SLI by native SB lane split x8+x8 - 68582

http://xdevs.com/kpc/sandy/test/03_8800_sli_8x_8x.png

So if you run 2-way it's wise to try avoiding NF200 bridge to reduce latency and have little better performance. All three tests with MIVE, coz UD7 don't allow have NF200 away if I recall correct :)


Aquamark comparsion

Aqua (MIVE, 2600K D1 ES, 5167MHz air, EVGA 285 GTX 2GB, 2x2G DDR3, Enermax 1250W)

362226, MIVE
LOD 4.9 :)

http://xdevs.com/kpc/sandy/test/aq_285_mive.PNG

362629, UD7
LOD 4.9 :)

http://xdevs.com/kpc/sandy/test/aq_285_ud7_lod49.PNG

Aquamark perf is about the same, in range of accuracy tolerance.

3-way 8800GTX on UD7 with Vantage

http://xdevs.com/kpc/sandy/test/vvan_3way_ud7.png

I tried to make 3-way SLI with 8800GTX on MIVE, but no luck. It was enabling only 2-way between 1st and 2nd card, or between 1st and 3rd card. :(

Btw, was discovered my old Cinebench 2003 tests from 2005 year "w00t" :D

Compare the evolution :)

http://xdevs.com/kpc/sandy/test/old_cb2k3.png

From celeron 326 up to 2600K :)

[nigel]

nice results :)

[rbuass]

That s the better work from 1155 i saw...
Congratz Tin....you did an amazing thread

[TiN]

Thanks for kind words :)

Update:

I described some issues with UD7 board not working with Gigabyte Odin GT 550W PSU. It was not motherboard issue, but faulty PSU. Checked it today with my Neutron PSU ATE, it's badly unstable on low-voltage loads. So it's not board fault :)

http://xdevs.com/kpc/sandy/test/gbto.png

[Raja@ASUS]

Tin, just a suggestion (and it may not be worthwhile to everyone and will increase your workload); I'd like to see ripple and transient test measurements from VTT and VDIMM power lines added to future reviews if possible.

-Raja

[TiN]

Sure, I think we will add such stuff later. I want to make complete methodology suit and assemble ATE for that. And also power tests per each rail directly (expect POL VRM output voltages ofc). Just let me have some time for it, i need to get some tools and network for them all.

It will be like automatic reviewing machine :D Maybe throw in some robot with photocamera later and keyboard, so it will write reviews and post on forums itself :D

Already found nice 19" rack for tools :)

Oh..i just told my secret plans...where is delete button... :D

[Raja@ASUS]

Sure, I think we will add such stuff later. I want to make complete methodology suit and assemble ATE for that. And also power tests per each rail directly (expect POL VRM output voltages ofc). Just let me have some time for it, i need to get some tools and network for them all.

It will be like automatic reviewing machine :D Maybe throw in some robot with photocamera later and keyboard, so it will write reviews and post on forums itself :D

Already found nice 19" rack for tools :)

Oh..i just told my secret plans...where is delete button... :D

That sounds cool. I wish I had the eqpmt back when i was reviewing, there was so much I wanted to expose..lol