Q6600 overclock trouble...

Smorgasbord

Smorgasbord

Smorgasbord

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15 Feb 2008
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245
Just got mi Q6600 today, overclocked to 3.2GHz (8*400) and the voltage to 1.4v. Has ran fine all today up until about an hour ago, when i started stress tetsing with Prime95 and after not even a minute it fails, it seems to last longer with 1.45 but still fails eventually.

Upped the FSB and "MCH" voltages by 0.1 each, and the PCI to 100. Anyone tell me what i could be doing wrong?
 
Ok,
Gigabyte GA-P35-DS3,
4*1GB sticks of OCZ 800MHz RAM,
8800GT (inno3D),
rctic Pro7 Freezer with custom fan.
Coolermaster 330 Elite case with a 520W modular PSU (case has 2*120MM fans)
 
How are the temps? is it over heating at all? Lack of air flow?

Try aiming a deskfan at it or something.

Use something like Coretemp to look at the temps when just idle in windows as well.

Is it fine at stock clocks and volts?
 
Maybe you should identify if it's the cpu or fsb. knock it down to 6x and see if it still fails. If it does, then it's fsb. Also keep ram underclocked to take it out of the equation. If it doesn't fail at x6 then it's the cpu. Try it at 3ghz first - 9x333 and see what happens. Do you know what your vid is? Check coretemp for this.
 
At stock clocks and volts i'm running at 37 on one core pair, and 33 on the other, at about 45 under load.

With overclock to 3.2GHz it goes up to 65C but fails the test after about ten minutes at 1.45volts.

EDIT: my vid is 1.325v coretemp reads.
 
No, I haven't i'll change it now, and report back, doesn't lowering the multi cause stress to the NB - That's what i've heard whether it's true or not i have no idea.
 
Seems to be working fine at 400*6 - what you reckon to do next??

I would like anything 3GHz+ with the FSB in sync with memory though! lol

Sorry for being picky.
 
You really ned to provide temps of your system ( idle & load) so the "Grand Oracles" of the forum can assist you :cool:

If you can also provide screenshots of coretemp, P95 & cpuz it would really assist in diagnosing your problem ;)

Best of luck and dont worry someone wil be able to help :D
 
Currently at 6*400 with stock voltage, appears stable even though i haven't done a full test yet.

They are idle at 28-30C on all four cores, and with running Prime95 i'm getting 47C on one pair and 44C on the other. I will provide screenshots like you say soon.

I've heard somewhere vDroop could be affecting me, can i bypass this without any pencil mods or anything if it is the case?
 
can;t really bypass it, for vdroop you could raise the voltage to take account of the drop, it will still have an impact but if you raise it to say 1.34 it will read at 1.335 instead of you're current reading after drop.

try running with just 2 sticks of memory.

temps seem fine.
 
Now you know your fsb is ok at 400, try pushing the cpu again. Try 9x333 for 3ghz. Your VID isn't the best, so you may not achieve sky high clocks. Make sure your ram is underclocked for now until you get the cpu sorted. Stick vcore to 1.35 at 9x333 and stick your vdimm to 2.1v. You should be able to leave the other stuff on auto for now. As for vdroop, my p5k premium has a setting called "load line calibration" that stops vdroop from being so dramatic - not sure about your motherboard.

See how you get on with that :)
 
If this works, you could try upping the fsb slowly until it fails, then bump vcore a bit more. Hopefully you'll get it to at least 3.2ghz
 
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