My machine used to run a 2.4C P4 @ 3.0. I was encoding with DVD Shrink and got a blue screen....the system had been stable for a good 4 months and then this happened. After rebooting I could no longer overclock even 1 MHz. I'm using an Abit IS7 motherboard with the latest bios. If I try to overclock at all now my monitor shows the "no input signal" error. After resetting the system enough times the second bios comes in and resets the working one so i can get back into the bios and play some more. Could I have damaged my motherboard so it won't overclock? Or could this be a problem with my RAM? I've got 4 sticks of 256 Corsair 3200 in it and even knocking down to 1 GB with any combination it does the same overclocking problem. By the way, I'm using stock cooling as well, but that makes no difference because it worked fine for so long.