Overclocking EVGA GeForce GTX 590 Classified

[RagingCain]

Hey TiN, we spoke briefly on the EVGA forum.

I promised some data for you, but this is just on water. The power curve continues down in 3DMark11 after 0.988.









We have also determine the "invisible" PDL / OCP settings, they are pretty severe but the change is back and forth (not constant.)



Here is the exact specifics of the down throttle:
Core: 553.5 MHz ~ 553 MHz ---- Derived from BOX#3
Shader: 1107 MHz ~ 1106 MHz ---- BOX#3
Memory: 801.5 MHz (Effective 1603 MHz ~ 1602/1604) ---- Derived from BOX#5

All and all my best overclock / benchmark was Unigine Heaven 2.5. Managed to reach a solid 830 MHz @ 1.038v. I kept getting a system power off after this point. Turns out my second GTX 590 had one of the 6+2 pins only 6 plugged into the PSU..... That will do it.... sigh.

New system is built everything is up and running. Just need to unlock voltage control for the latest drivers. You wouldn't know where I could ask about this do you? I would love to bench on the newer drivers.

[Chiller]

Msi afterburner doesn't support that on the newest driver?

also tried Msi afterburner 2.20 beta ?

[TiN]

Thanks! Why do you want to unlock voltage control? Card will die 100%.

[mosie]

not in WC.

[RagingCain]

Originally Posted by TiN

Thanks! Why do you want to unlock voltage control? Card will die 100%.

I have 2 reasons, I am water cooled, and that does include very good coverage on the VRM areas, so I would like to be able to overclock to the voltages initially deemed safe by nVidia 0.913v to 1.050v, but since then we are locked at stock voltages, it is lame essentially.

2nd reason, there is a BIOS glitch on EVGA cards (maybe other brands) that while being 0.925v for 630 MHz, one of the GPU dips down to 0.913v which is just enough for stock 607 MHz. Causes many GDDR5 / CUDA related errors at stock clocks.

I am working with EVGA to fix the BIOS, I am testing one in beta right now, but it only worked for one card (one of my 590s). All 4 BIOS's installed for 2x GTX 590s, but the 4th GPU didn't take a voltage increase. Its still stuck at 0.913v.

May not seem like a big deal, but it makes a lot of things prone to locking up crashing / BSOD. With voltage control being set to 0.925v and then applied, it sticks to all 4 GPUs till I reboot. Even if I close Afterburner.

Yes, the voltage is locked by any driver newer than 267.85 for all voltage controlling 3rd party software so far.

Of course, there are many benefits to using the 27x.xx drivers for us, so I have to choose between nVidia performance upgrades and driver fixes vs. occasional BSOD/ GPU Error. Its really not fair.

[TiN]

Watercooling will not help, issues are not due temperature.
I experienced VRM failure under subzero GPU's and +20°C VRM.

Keep us posted. I will continue on 590's this week.

[mosie]

"I experienced VRM failure under subzero GPU's and +20°C VRM. " at what V ?

friend set in bio 1.088V at 900 in WC

Work fine in bench

[wesjuhdabomb]

Originally Posted by pcm81

Cool Pictures!!! But, can it run DragonAge 2?

But will it blend?

[TiN]

Time to get it working now

livestream.com/evga_oc
Prepare card, pretest and go

[Cyph3r_Smurf]

Nice