Hey guys im in need of some help. I just built a computer last night but for some reason the computer shuts down by itself right after i get a CMOS checksum error. I can get into the bios before that and load defaults, but that only gets me to the OS loading screen where it shuts down on me again. The system has 2 HD's, 2 optical drives, an x300 video card and a athlon 3800 X2; its all powered by a Antec 380 PSU. Can anyone think of any reason why I keep shutting down?