Mmmmm... did you change anything else that might have caused the problem ? New motherboard/video card drivers ? Also, if you want to overclock, you have to make sure your pc is stable. Use
memtest86 and
Prime95 to make sure your memory is working perfectly and your cpu is not making any calculating errors. I can assure you that seemingly stable pcs have shown errors with these two programs, only when these two programs cannot show any errors over at least an 8 hour burn in, can you really say that your pc is stable. I overclocked my PC to within an inch of its life and I never have crashes
