Is it remotely possible that a video card could conflict with a monitor?

Here is the scenario...
Wife has a GeForce 4 Ti 4200. I have the GeForce 3.

When she plays any 3D games and depending on the graphic intensity, her monitor would be "white washed" after a time. At first I thought it had to be one of two things. Either heat related or a driver issue.

I put her card into my computer and ran the game. After a few hours, it was running good. I ruled out it being heat related.
I updated every driver known for her computer and reinserted her video card back. Again it would "white wash" after a short time.

By the way, it would only "white wash" her monitor with 3D games only. Anything other that, there was no problem at all.

I should also mention that I replaced her motherboard just in case something was wrong with the AGP port. I also replaced the RAM thinking it could be bad RAM. And I reinstalled XP to top that off with the updated drivers again.
All those changes didn't help.

When I use the GF3 card in her computer, everything is fine and dandy. She is able to play any 3D games without the "white wash".

So needlees to say, I had to swap the video cards.

My only conclusion was that the GF4 conflicted with her monitor some how or another.
I didn't think it was possible, but guess I was wrong. :)

Thanks.

Was the "whitewash" effect present in the game or in windows after she exited the game?

If it was after the game, it may not have been properly resetting the gamma level. One quick check would be to change the display settings....if the proper color level is restored then it is the game's fault.

Only during any 3D intense game.

Once it "white washed" computer had to be restarted.
No way of telling if game locked up or if monitor fizzled.

I've had that happen when the game crashed. If was just the game that went I could reset the display settings and continue on.

That card is going to run a lot hotter than the older one and it will get hottest when playing an intense 3D game. I would check system temps and maybe try blowing a small desktop fan into the open case onto the video card while playing one of those games and see what happens.

I think I'm having the same problem. I'll be playing a 3d game or running a 3d benchmark and the video will suddenly crash. My system will still be running, it's just the video that crashes. All of the sudden the display will be replaced with a strange grayish mess of color. Is this the same thing you're talking about? I don't think it's a heat issue because sometimes it'll happen after about 5 minutes and other times it won't happen until 45 to 60 minute into the application.
It's not a conflict between the monitor and the card either because I've had the same parts for over a year now. It just started happening to me about a week ago after I put in a new cpu and mobo. If you find a solution, let me know please.

Have you tried running the fan as suggested??? It may not be heat, but you can't rule that out until you do some testing. If it is heat, the crash will occur when the card overheats, whether that takes an hour or a minute. Video cards run hottest when they are doing 3D work, so that is a likely possibility. Also, with a new board and CPU, your overall system temps may be up and that would make overheating more likely. You may also need to check video settings in the new BIOS.

When you swapped out the motherboard for a new one, I assume you installed the chipset drivers for the new motherboard before installing video card drivers? The chipset drivers will have GART and other AGP related drivers that especially a GF4 card will require.

What version of video card drivers are you running, and have you tried earlier versions of the DET drivers? Are the drivers you're using WHQL?

What version of DirectX are you running? Oftentimes when these types of conflicts arise, there is a problem with DirectX playing nice with the video card drivers. Could be that you will have to disable hardware acceleration, or at least back if off a notch.

Run DXDIAG and go through the dialog screens. Look for conflicts and/or problems with Direc Draw, Open G/L, etc.

I've already done all of those things to no avail. I just swapped
out the Geforce 4 with a Radeon 9700. I want to see if the video card itself was bad. I'll post back later tonight or tommorrow with the results.

Well, I've put about 7-8 hours of heavy gaming on my system since I switched cards and I haven't had a single crash. Looks like that Geforce was the problem.