So recently I have overclocked my i7 4790K on the msi z97 GD65 to 4.5 ghz and my computer crashes once and then when I reboot with the same settings it doesn't crash again and I wanted to know why this happens.
Crash/BSOD suggests instability with those settings. Either decrease OC or increase voltage until stable. Adjust in small steps and test with prime95 on small FFT setting.