I have been getting random shutdowns after 15 to 45 min.(complete shutdowns no reboots) I have a feeling it's my power supply or video card ( Nvidia GTX 275) when I installed a plain jane PCI card the computer is fine.
Tyan S2915E 2 duel core 2220 processors
2 western digital hard drives
1 DVD RW
Nvidia GTX 275 video card
2 gigs of RAM