I can get my 6850k to boot at 4.5ghz @ 1.39v. the hottest it gets at torture tests via prime95 after 3 hours is around 73c (too hot?). If i preform a restart, the bios comes up and won't let me load into windows again until i wipe the bios settings and re-overclock again. This is my first overclock, Is there something i'm missing?