Screen distortion

[deadzone428]

Ok kids here's a fun one for ya...

Athlon X2 4400+
2GB DDR400
nVidia 7800GT 256mb
300GB IDE HDD

Everytime I run something fullscreen (games, 3dmark, even the directdraw tests in dxdiag) the screen distorts. Or screens, since I'm running dual LCD monitors at 1280x1024. I've completely uninstalled and reinstalled the video card, DirectX, monitor drivers, everything...I can't think of anything else short of trying VGA instead of DVI, but I don't have my VGA cables and DVI to VGA adapters here at school. The weird thing is, a week ago I ran a clean install (all this is new hardware). Everything worked fine for about 3 days, then this problem started.

Anyone have any ideas, other than trying VGA?

edit: After the screen distorts, I can't exit the full screen program because the display stays distorted. And it's completely corrupted, only sometimes is it mildly distorted. One of these times, I took a screenshot, and the image was fine - so it's the monitors, not the actual desktop.

Also, my power supply has two 12v rails at 19a each, and the video card says it needs 26a 12v....so do the two 12v rails stack or do I need a PSU that has one rail at at least 26a?

 

[Anime_Fan]

Try running the game in single monitor mode and see what happens....

 

[deadzone428]

Tried running it on one monitor and same result. Runs 2D fine but anything 3D, it craps out. In addition, I'm now getting a BIOS beep code in the POST - one long, two short. Video card, looks like I'm about to RMA? Unless anyone has a better idea...