So i rebooted my machine yesterday to find out that i will not reboot. -new parts about a week old (asus p8z77-v), i3570k. -older parts 8 gigs of mushkin ram -ati 5870 vid -antec 750 watt psu (as far as I can remember). Machine tries to boot...but does not. Sounds like my CPU fan starts up on a regular speed and then slows down, goes up and then down. Mouse and keyboard power up....and then power off, continue to do this. I am thinking it is PSU....but I would like anyone guesses to make sure I am going down the right path. Thanks!