Q6600 Overclock Seems To Cause 3DMark06 To Crash

I overclocked my Q6600 to 3.0 Ghz and had problems so I just backed it down to 2.75 and all was well until I tried to run 3DMark06 at a 1680 x 1050 resolution with anti-aliasing at 8. I had my 8800 GTS video card overclocked to 675 core and 1020 memory so I thought that might be the problem. But after I underclocked my cpu back to stock 3DMark worked even with the overclocked vid card. The problem I get is my comp crashes with a big blue screen with this text appearing in the top left corner:

*** Hardware Malfunction

Call your hardware vendor for support

*** The system has halted ***

The thing is that I can run normally with my CPU modestly overclocked to 2.75 but I really wanna use 3DMark06 with it overclocked. Any help would be greatly appreciated!

More voltage required.

Q6600 at 2.75Ghz dont need a voltage increase. i think its his vid card OC is not stable.

and don't forget memtest86+ to really test those rams you got, some 12 hours without errors is usually good enough.

A 3G OC on a Q6600 shouldn't need more voltage. I have mine at 3G and I lowered my Vcore from a VID (stock Vcore) of 1.3 to 1.275.

I guess no specs.

Did you lock the PCIe to 100-105. If you locked it to 100, then try 101.

PSU is a Silverstone 680 Watt Zeus Model

Crucial Ballistix Memory is 2 1GB sticks that are running at 667 (standard for this memory) when my CPU is overclocked to 3.0 Ghz (Sync Mode)

MOBO is a P5N-E SLi I believe 650i chipset?

And I left voltage at auto cause like other people have said: an overclock up to 2.75 shouldn't be enough to do so. my VID is 1.3250 And I have a vdroop of about .1 V if i remember correctly

Also, I can run 3DMark06 with my vid card overclocked but with the CPU at stock. So i'm doubting it's the video card.

are you sure? Nonetheless I was thinking of buying another mobo, but in a while since I just dropped another $160 on my comp about 5 mins ago I was suspecting it could be the motherboard, if so what would you guys recommend for an SLI system (although it doesn't HAVE to be, but it would be nice, if you could refer me to both sli and non-sli q6600 overclockers that would be great).

What?

VID is the Vcore that is chosen by Intel and, I believe, saved in the MSR. That's why I said VID instead of stock Vcore.

From Intel's site.

I'll go back and add (stock Vcore) for you. Feel better?

ROFL...

VID can't possibly change. It's probably just a glitch in Core Temp.

they need to update core temp. bad vid readings for e4600.

starwars120, did you lock the PCIe to 100?

I would OC to 3G and run Prime 95 for an hour or so and boot to memtest86+ and test the RAM. Do this to see if it is the OC alone or how the OC is affecting the card.

Those SLI mobos don't seem to be as stable as the P35/P45 mobos.

Well I haven't ever seen the VID change in Core Temp so I'm assuming that he got them mixed up. I believe it is stored in the MSR.

Dagger, put the dagger away.

Yeah PCIe is at 100Mhz last I checked. And as for Memtest I can just make an iso image right? No floppy disk on me anymore

the CPU should survive on that mobo OC above 3Ghz. its the grapgics

the vid change is because the speedstep and C1E feature on the mobo that underclocks the CPU to a lower speed and applied lower voltage.

you cant change VID but it does change in coretemp if C1E or speedstep is enable in BIOS.

i think you should read my post again.

Ok overclocked to 3.0ghz and tested with prime95 no problem, burning disk now and will try using memtest.

well, turns out I'm pretty sure it was just the dual monitors I had that was screwing with it. 3DMark06 Worked fine when I set it to single monitors with both the CPU and GPU overclocked. Thanks for all the help guys. Let's hope it stays fixed *fingers crossed*

I ran it for an hour but tonight I might just go ahead and run the small ffts till morning because after I saw 3DMark06 go alright I feel like it should be ok now that I got it all sorted out.

load temps hit 57 max

Happy to see you got it worked out. I didn't see anywhere that you mentioned the little tidbit about the dual monitors. You probably would have gotten ten posts to turn that off in the beginning.