Hi,
I am having some problems on screen with my radeon 9800. On the desktop I get weird specks of varying color. When I go to play a game, the screen starts to streak like crazy. Some games I cannot play at all. On prince of persia; two thrones- the computer crashes completely.

I have an MSI board, 512 MB ram, and XP professional.

Have you tried seeing if there are newer drives or just re-installing the card?

Also check to see if its seated right in the mother board.