If this was my machine, I'd have a 450 Watt or larger power supply, the BIOS would be current and set to defaults, then I'd try the onboard sound to sniff out if there are still Via/Sis/Audigy issues.
In closing, all drivers must be latest... And leave the cover off.
i am running win 2000 pro on an athlon 3200 with 1gig ram, 1 80gig seagate sata harddrive, soundblaster audigy2zs, ati 9800 pro, etc.. my computer will randomly freeze for no apparent reason. sometimes it is when i am playing a game (half-life 2, black and white, etc) that it will freeze.
by freeze i mean the following: screen locks, mouse and keyboard are unresponsive, sound will loop for a few seconds, then go quiet. the only thing i can do is hit reset on my computer.
i don't, however, have to be playing games for it to freeze, i can have no programs running but the screensaver (the picture slideshow one) and it will freeze. there seems to be no common cause. i have checked the event log, and nothing seems to be the obvious problem.
any ideas or assistance would be GREATLY appreciated. the pc is about to get tossed out the window.