Trouble OCing Core 2 Q6600

[Acidian56]

Ive been having problems clocking up my intel core 2 quad 6600. Im using an asus p5b-v motherboard. I bought it before everyone started recommending p5w (I think its p5w anyway). At any rate, this is my first overclocking attempt and I seem to be failing. I get my fsb to 284 pasing post, then at 285 my computer starts up, but the screen remains black. Ive tried diffrent voltage settings from 1.2750 to 1.4625, fsb termination voltage from 1.2v- 1.5v, and northbridge from 1.25 to 1.55. My ram I keep at 2.1v which is Corsair TWIN2XP2048-6400C4. Ive tried it at both 533, 667 and 800mhz, as well as trying both cas 4-4-4-12 and 5-5-5-15. PCI Express frequency I keep at 100 and pci clock synch mode at 33.33mhz.

Ive also tried turning the fsb multiplier down to 8 and increasing the fsb to 320. Which doesnt work either.

Is my cpu just bugged and I just wont get it over 2556mhz?

 

[closed_deal]

Looks like you've done your homework on the o/c, mind it's seems that you've done everything to get past 2.5 on that mobo. Only thing i could suggest is updating the bios. If lowering the RAM, increasing the vcore an vdimm or NB voltage doesn't work i'd say either poor mobo or bad CPU.

Not sure what else to recommend, maybe someone else has that mobo and can help you?

 

[cnumartyr]

Ive been having problems clocking up my intel core 2 quad 6600. Im using an asus p5b-v motherboard. I bought it before everyone started recommending p5w (I think its p5w anyway). At any rate, this is my first overclocking attempt and I seem to be failing. I get my fsb to 284 pasing post, then at 285 my computer starts up, but the screen remains black. Ive tried diffrent voltage settings from 1.2750 to 1.4625, fsb termination voltage from 1.2v- 1.5v, and northbridge from 1.25 to 1.55. My ram I keep at 2.1v which is Corsair TWIN2XP2048-6400C4. Ive tried it at both 533, 667 and 800mhz, as well as trying both cas 4-4-4-12 and 5-5-5-15. PCI Express frequency I keep at 100 and pci clock synch mode at 33.33mhz.

Ive also tried turning the fsb multiplier down to 8 and increasing the fsb to 320. Which doesnt work either.

Is my cpu just bugged and I just wont get it over 2556mhz?

Have you tried 6x285?

Reason I ask is if it still won't work it might be some settings on the motherboard.

Mess with a few settings, I would leave voltages down to normal, that obviously isn't the issue. If it won't post a 285x6 keep going up by 5 until you hit about 350 or so.. maybe it's a FSB hole. It could be a lot of things. Keep the timings loose and keep trying, if it was a voltage problem is would have probably atleast posted considering 284 worked (and then just been unstable).

Does the board have DRAM Static Read Control or any "proprietary" settings like that in the BIOS?

 

[Acidian56]

Ive tried 6x285 and it wont work, I also tried 6x350.

The other settuings under NB is:
Drawm Write Recovery Time (Set this to 6)
DRAM TRFC (Set this to 42)
Auto PCI MMIO Allocation (set to enabled)

Initiate Graphics Adapter )PEG/PCI)
Internal Graphids Mode Select (Disabled)
DVMT Mode Select (DVMT Mode)
DVMT/Fixed Memory (256mb)

PEG Port Configuration:
PEG Link Mode (auto)

 

[cnumartyr]

Ive tried 6x285 and it wont work, I also tried 6x350.

The other settuings under NB is:
Drawm Write Recovery Time (Set this to 6)
DRAM TRFC (Set this to 42)
Auto PCI MMIO Allocation (set to enabled)

Initiate Graphics Adapter )PEG/PCI)
Internal Graphids Mode Select (Disabled)
DVMT Mode Select (DVMT Mode)
DVMT/Fixed Memory (256mb)

PEG Port Configuration:
PEG Link Mode (auto)

I would almost say it's the motherboards limit, not the chip. (If you can run 284x9 and not 285x6).

Try increasing CPU PLL Voltage a bit (if you have that option) but don't go over 1.6v.

 

[Acidian56]

I dont have that option =/

Its weird, but I think Im giving this up. Thanks for your help though

 

[cnumartyr]

I dont have that option =/

Its weird, but I think Im giving this up. Thanks for your help though

No prob, sorry you can't get further!

Perhaps a P45 is in your future this summer!

 

[rayzor]

I had a very similar problem with my Q6600 on my MSI P6N sli Platinum. For some reason i could only get the overclock to work when I set my memory at its rated speed of 800 mhz.