Video card going out?

i get bars of pixels going across my screen most of the time. They are sometimes black and other times they are multi-colored. Also when i scroll down a page, some times it does this funky thing where it looks like....man i cant really describe it..... i cant get a screen capture of it because it goes away when i click outside of the window
Also, if they are in a window, they will move with that window.
Could this be happening because of the video card going out?
The lines look just like this: http://farm4.static.flickr.com/3243/25990075431695b18555b.jpg
Message was edited by: Derek Collier

Hi
Actually I noticed it first on the upgrade screen from Tiger to Leopard, and it then became progressively worse, even before 10.5.2.
Since increasing fan speed seems to help I don't believe it's a software issue, although software can play a part in stressing (or de-stressing) the video card. If the fans work for you and your iMac is out of warranty you might just have to live with it. The cost of repair for a video card/logic board (from what I'm told) is not worth contemplating.
Also, as a photographer I'm not planning to upgrade to the new iMac because of the gloss screen. With any luck the next generation of iMac will have a choice between gloss and matte.
Cheers,
GLi
Message was edited by: GLiMAC

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Video card going out?

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