Some graphic issue

[Osede]

Recently, I keep getting this kind of graphic issue(shown in SS, top right). Not only in wow but also in FF. I'm thinking of this should be something wrong with my graphic card, any ideas before I try to claim for some sort of warranty?

edit: forgot to mention my spec
graphic card: msi 7900GT
cpu: c2d 4300
2g ram
MSI board, i have forgot the series name
wins xp

[Snowknight26]

Overheating? Defective card?

[Seditedi]

Tried changing your drivers?

[Sigi]

if new drivers do not fix the issue, it's the card. You've got artifacts, and artifacts = BAD.

[Osede]

well, i got the newest driver. But I just uninstall and reinstall it again, but currently it seems like working fine. I might give it to run for few days again and see. Seem to be always happened after i alt+tab it and doing other stuff for few minutes.