Help! CPU coldbug drives me crazy!

[wytiwx]

Hey, everyone. I am Wei, I am a freshmen here, and in LN2 overclocking too. I try to pull my P4 651 to an extreme frequency, but coldbug bothers me .
For example, Sometimes coldbug is below -170 C, Sometimes coldbug is above -160 C. The VID gets higher, coldbug becomes higher too. Now I only get 459 X 17 = 7.8GHz at VID= 1.848V, about -165 C. http://valid.canardpc.com/show_oc.php?id=1316895

How to deal with the coldbug? Can Socket 775 be moded to past coldbug just like the Clarkdale? Please help!

[TiN]

Try higher volts. And VID is != Vcore.

[HITandRUN]

Thats some nice clock there mate! Like TIN said try more voltage and see what happens.

[wytiwx]

Sorry, my mistake. Vcore, not VID. But I found something strange. Firstly my P4 651 coldbug at -155 C when Vcore is above 1.9V, then coldbug at -165 C when Vcore is 1.85V. Should I think about anything else? like Voltage of NB? or Vtt?

[Sam]

I tried P5Q3-Deluxe with a coldbuggedless E8600 once - had similar issues at -160ish so I'll blame the board

try something else, like P5B-Deluxe / Commando or P5E3-Premium .. your chip looks very promising, especially with P45 chipset you're using not being famous for its cedarmill clocking capabilities

oh, and a standart question - can you provide the batchnumber or a picture of CPU?

[wytiwx]

The batchnumber of my P4 651 is L733B583. I will try another chipset like P965 or X48, etc. I think I would get higher freq if coldbug below -170C.

[Oliver]

Hey man, keep pushing it

Originally Posted by wytiwx

The batchnumber of my P4 651 is L733B503. I will try another chipset like P965 or X48, etc. I think I would get higher freq if coldbug below -170C.

You just increased the load on ebay`s servers

[Splave]

did you try ignoring temperatures in bios? helped my cold boot bug on commando immensely so maybe it would help your cold bug

[BenchZowner]

Try lower CPU & FSB PLL voltage ( don't know if your mobo has those options and how low it allows you to go, might need hardware mods ).
Those should help you the most with the coldbug.

[wytiwx]

Originally Posted by Splave

did you try ignoring temperatures in bios? helped my cold boot bug on commando immensely so maybe it would help your cold bug

umm, there is no option about ignoring temperatures in BIOS of my P5Q Premium.