Overclocking Q8400

As long as the voltage applied to the CPU has not increased, the temperatures pretty much will not either.

Install CoreTemp. Then run it. You will see a setting called VID. That's the default voltage for the chip. Lower is better. Intel's max voltage for a 45 nm CPU is 1.3625 volts. Subtract your VID from that. The difference is how much you can overvolt the CPU.

Set your BIOS for the VID. Run the FSB up until the system is not stable. Increase the voltage a little, then increase the FSB. Test. Repeat until vcore reaches 1.3625 volts or the temps reach 70 C.

I have the same Q8400 CPU on an eVGA 750i SLI m/b, and I managed to get it to where I can run with the settings on manual with 1333 FSB and 1.2250v for the CPU core, but as soon as I try to increase it above 1333, like even 1375, I can't boot. I tried increasing the CPU voltage one notch, but still no boot.

Any suggestions how to go about this? Almost every time I just get a black screen and then I need to power it off, clear CMOS, and start over, and I haven't been able to get above 1333 it seems no matter what I try.

VID is 1.2250

thanks if anyone could suggest...