There are a lot of version of "Crashes". It could mean BSOD "Blue Screen of Death", Freezes (or nothing happens with the desktop still on but no mouse or kb movement), Page Faults, or even reboots. So which one is it? IRQ conflicts are usually the cause of Freezes or Reboots. BSOD are usually caused by memory address problems cause by drivers or 3rd party softwares. Page faults are almost similar with BSOD except only on specific programs. Reboots & BSOD's are usually symptoms of a bad or under rated PSU.