My computer randomly shuts off.
I built my own computer and everything was fine. Then I decided to buy a new heatsink and new 120 mm fan to cool it down, because the cpu was hitting 75 C. So I got those, but now my computer seems to shut off on its own. Sometimes when I turn it on it starts to boot up, and then shuts off, or even when I'm in the middle of something it'll just turn off. I opened up the case to make sure everything was plugged in, and it seems fine. I have a 3.2 Ghz, x700 pro graphics, audigy 2 value sound, a dvd and cdrw drive, raptor 32 gig and seagate 200 gig, an abit AG8 mobo, and a 450 watt power supply.