I know I'm a first time poster, but I've tried three other boards now for help and you all sound like you are great at diagnosing problems.
Here's the system setup:
AMD Athlon 64 3800+ AM2 (Stock Heatsink - May order a Arctic Freezer 64 Pro)
Crucial Ballistix DDR2-6400 (2x512)
EVGA 7900gs KO
Mad Dog DVD-ROM Drive
NEC 3550A DVD-RW Drive
Seagate 7200RPM 160GB SATA
Seagate 7200RPM 200GB IDE
This is all powered by a Cooler Master 450watt ACLY
power supply. Right now all of the components are in a Antec Lanboy, but a Cooler Master Centurion 5 (with a 380w power supply included) is coming tomorrow. The monitor is a Hanns-G HC194D 19" LCD.
When I first purchased the board, I was not planning on getting a video card for a while - but a great deal on a PNY 7900gs card changed that. I plugged the card in, it would run games and basic apps without any problems. The problem came when I started to run video files - wmv files would run fine, but avi, mpeg, mp4, and even DVD's caused the system to lockup quickly. I'd have to reboot the computer when it crashed. After two weeks, I returned the graphics card for another of the same model, and it did the same thing. So, after getting rid of the card, I started to run some of these files with the onboard video again.
Frustratingly, the onboard video started to lock up. Ordered an EVGA 7900gs, and installed it recently. It worked for a while - and then locked up.
According to the Abit EQ program, my temps are this when idle:
CPU: 34 C
SYS: 28 C
PWM: 37 C
Speedfan has this reading:
NVidia's GPU is around 48 C.
Everything looks good temp wise, at least to me. The power supply, from what I can tell of it, looks like it has more than enough juice and amps on the 12v rails (18A on the first, 16A on the second) to handle the video card.
I installed both the newest and older drivers for the video card (I'm currently running on ForceWare 91.28) and it's locked up each time.
So, what gives? I've tried every solution in the book to cool the thing down, but that doesn't seem to be the problem. Do I need to RMA the board and get a new one at this point?