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Weird video issue

I

Ipno

Golden Member
I recently reinstalled my entire system, clean sweep. Have the latest drivers installed and all that.

I've got a really weird problem that may be something simple that I just don't know how to describe very well.

When I am playing a game, after a minute or so the video goes all wonky, by wonky, I mean it looks like this:

Wonky Video

I apologize for the quality of the picture, the sun is shining through the window and the cameraphone is ... well a cameraphone.

The thing is when I took that picture the game had barely even loaded (this instance was Railroad Tycoon 3) and in fact wasn't on a 3D screen yet, just the menu. The issue however isn't with the particular game because its happened in multiple games, UT2k4 and Portal as well.

To add another twist to my frustration, if I alt-tab out of the game and back into the game, the game will be fine for about a minute until it goes crazy again. I can do this all night to *fix* it but it will always go bad after a little while.

Also, if I play the exact same game in 'windowed' mode instead of full screen, at the exact same resolution (1024x768) it's fine. It never messes up and runs like a champ.

Not really sure what's going on here, please help!
 
AMD XP 3700+ (San Diego) on an Abit AN8 SLI MB, 2GB DDR400 ram, 7900 GT 256MB, its running a seasonic 550W PSU, I built this computer 3 years ago and it's never given me this problem before. About a year ago I installed Linux on it and ran that for a while but recently wanted to get back into gaming so I reinstalled XP. According to speedfan GPU core is running at 60C loaded which if I remember correctly is about the same as it used to. Nothing is overclocked.
 
Have you download and installed the latest video drivers for your video card after you installed XP ? Also a lose video / monitor cable has been known to give me an issue like yours before.
 
Yeah latest drivers. I'll check the cable when I get home. I will also try hooking up another monitor.
 
Updated to the drivers released yesterday. No change.

Changed to a trusty old CRT, No change.

ARGHHGHGHGH
 
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