Just a couple of months ago I built my own computer.  I got everything I wanted.  Well now my awesome Radeon 9800 XT graphics card is screwing up on my.  I think.  I've downloaded all of the latest drivers for my motherboard Asus A7N8X-E Deluxe with a AMD 3200 and my ATI drivers.  Everytime I try to play a game my screen flickers and is garbled.  I'm starting to think that my graphics card is a dud.  Please someone Help!!!

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