I used to have my 2.8 Prescott OCed to about 3.1 GHz. I have a Asus P5GD1-VM motherboard and it does not support overclocking through the BIOS so I was using Clockgen. After a reformat I did not turn the overclocks back on for some time and when I tried to once again bring them clocks back up to 3.1 to 2.8 it crashes.

Now, I did not just go from 2.8 to 3.1, I went from 2.8 to 2.85 in small increments but it does not matter because it just crashes after I increase it once. some times it takes a second or two.

The crash it also a bit strange, the computer does not lock up. Only parts of it do. Sometimes sound goes out followed by Windows not responding but the mouse working. Kind of random.

Anyone got any ideas?

Since you have a VM(value motherboard) board which does not have voltage tweaks or FSB/RAM/PCI adjustment, therefore your overclock will be limited. When you increase the FSB through software, you also notice that RAM speed, PCI-E/PCI also go up. If software doesn't work, then you are stuck with what you have...

TMP-Man

Asus P5P800-SE PAT
P4 506 @ 4009Mhz 1.3625v
Thermaltake CLP0024 w/ 1700RPM 92MM + AS5
2GB OCZ 2-3-2-5 DDR400
120GB/300GB 7200RPM HD
Leadtek 7600 AGP 590/1600 VF700 ALCU AS5

That is all true but the fact is that I was using Clockgen successfully and there were no problems and now there are with the same program.

Then why did you reformat?

I got a new hard drive because the one I was using began failing(clicking, crashes).