I just installed a new GIGABYTE GA-990FXA-UD5 motherboard. I installed my old stock CPU fan after cleaning it with canned air and wiping the base, it got pretty noisy before the computer crashed so I'm thinking it could be a CPU temp issue. Right now my CPU is sitting at 47.0 C on my bios screen. It booted up find for the first time and I started watching a youtube video after reacivating it when it crashed and now it won't stay on for longer then a minute. Windows won't boot after it crashes unless I turn it off and then back on. When I boot and open speedfan the temperatures seem to fluctuate. The ones you see on the link is when the computer first booted after idling in bios for several minutes http://i.imgur.com/K24nx1R.jpg I read that I need to re-install windows after installing a new motherboard. It booted up fine and I was able to reactivate it using the phone option though. Could I still need to reinstall Windows 8 even though it booted up fine?