Q6600 unstable @ 2700Mhz !!!

Slinwagh

Slinwagh

Slinwagh

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Right I have rebuilt my rig and had to put it back on Air.

Anyway I just can't seem to overclock the thing now my Q6600 is unstable at 2.7 GHz in Windows never mind Prime !

vCore is at 1.425 (1.39 CPU -Z)

All other voltages are set to Auto

Memory is unlinked at stock speeds, 800Mhz

So what is wrong !!!
 
Im confused now, an hour ago I started a Prime95 blend test and an hour later it is still running with no errors yet before that the PC was rebooting in windows.
 
I have just stopped the Prime test, 2 hours with no errors and then tried the Crysis benchmark and the PC rebooted.

I then upped the CPU FSB voltage from 1.4v to 1.5v and rebooted and ran the Crysis benchmark with no errors or reboots.
 
Well since upping the CPU FSB from 1.4v to 1.5v everything seems stable. I have just run Prime95, small FFT over night for 9 hours with no errors.

Time to push the overclock !!!
 
Stelly said:
Could be the motherboard letting you down, I couldnt clock my Q6600 on my A1 680i

Stelly
Click to expand...

I have had it up to 3.2 on water but it was hard work getting it there on this board.

I went from 2700Mhz this morning to 2800Mhz and ended up again with the random reboots that is with the same settings as the stable Prime95 9 hour pass.

Time for a P35 me thinks.
 
Slinwagh said:
I have had it up to 3.2 on water but it was hard work getting it there on this board.

I went from 2700Mhz this morning to 2800Mhz and ended up again with the random reboots that is with the same settings as the stable Prime95 9 hour pass.

Time for a P35 me thinks.
Click to expand...

Well I did the same as your thinking I ditched the 680 (even though I'm getting an upgrade through EVGA) and got myself a Asus Maximus Formula SE and I'm now getting 3.8 on my quad... I agree that the 680 is very unstable for overclocking... if you want a good P35 motherboard I recommend the Gigabyte GA-P35C-DS3R...

Stelly
 
Jeepers.......

Now I aint no overclocking guru but i just waltzed my Q6600 up to 3.0Ghz on standard voltage/air cooling with my GA-P31-DS3L

I dont even class that as an overclock yet.

Are the Nvidia boards just wick?

Jinj
 
How can it be the motherboard since he got a good overclock before with the same motherboard?

Are your ram voltages correct? Put it in manual, as my (same) motherboard detect auto voltage of 1.9V and it should have been 2.1V.

what are your temps like?
 
Van_Dammesque said:
How can it be the motherboard since he got a good overclock before with the same motherboard?

Are your ram voltages correct? Put it in manual, as my (same) motherboard detect auto voltage of 1.9V and it should have been 2.1V.

what are your temps like?
Click to expand...

RAM voltages are set to 1.9v which is the maximum according to G.Skill.

Temps under load during the 9 hour Prime 95 test maxed out at 65'c
 
Slinwagh said:
RAM voltages are set to 1.9v which is the maximum according to G.Skill.

Temps under load during the 9 hour Prime 95 test maxed out at 65'c
Click to expand...

I presume that the intel speedstep and stuff are turned off? Try losening your ram timing (like 2T etc..) and see if that helps, then you can always tighten them back up.
Another desperate tactic maybe to reflash the bios again!?
Could it be something else causing windows to crash?
 
Van_Dammesque said:
I presume that the intel speedstep and stuff are turned off? Try losening your ram timing (like 2T etc..) and see if that helps, then you can always tighten them back up.
Another desperate tactic maybe to reflash the bios again!?
Could it be something else causing windows to crash?
Click to expand...

RAM timings are default at 2T, Speedstep, EIST, VT etc all off.

It is pretty much a clean install of Windows plus drivers, Crysis and CoD4.
 
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