Gigabyte + i7 860 cannot OC on cold boot -- help

L

lordsegan

Gawd
Joined
Jun 16, 2004
Messages
624
I have a Gigabyte P55A UD3 and P55A UD4P and i7 860.

I have it at 1.35 vcore, and I think ~1.2 VTT/QPI + 1.86 MCH.

Ram is ADATA 1600 gaming 2x2 gb.

On cold boot, from 3.6-4ghz, I get BSOD or errors in firefox (crash) or errors in IntelBurnTest.

On warm boot (or after several reboots) it can run stable all day up to at least 3.8ghz.

Vcore in CPUZ is sometimes as low as 1.28 (set to 1.35 in BIOS).

I have tried load calibration on and off (off currently).

Any ideas?

Corsair HX 620 + 5870 + 2HD + 3 240mm fans.

I also have an intel NIC.

My transport is set to 32X instead of auto.
 
I have the same board and cpu and am not having any problems. First of all MCH on a P55? I really hope that you aren't running your ram at 1.86v or you may have already degraded your cpu.

What bios are you running? Are you using sleep mode?
 
There is an option in the bios called load line calibration. Turn it on. You can probably drop the voltage some after you turn it on too.
 
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