I began to saw some artifacts, since a few days ago, while playing a speed_metal game. Since then I keep getting (non-3d) artifacts.
I have made a little record of my screens *because I was not able to capture it with a screenshot).*
http://daantimmer.mine.nu/downloads/DSCN2224.MOV
It is 9.57MB big, and I am on a 20/2mbits line. so don't expect long loading times :)
I keep getting them when the game is loading, but also when the game is loaded.
I sometimes see them trought the green nanolathing stuff, or truoghout the menu to the left or some black bars on the energy and metal bars.
I hope I have been as constructive as possible. If any more info has to be included, just ask I will most likely give it out. (Except from my creditcard number

My specs:
AMD athlon64 3200+
XFX GeForce 6800GT (twinview, 2x 19"LCD)
15xxMB ram.