I have an MSI R6870 (Twin Frozr II) into a new build. I have Skyrim on Steam and the latest drivers, but when I tried to play it, everything like foliage and mountainsides are artifacting like crazy. My FPS is fine, and the system is stable with no overclocks. An i3 2120. All new items. Skyrim is one of two games I've been able to test, the other one was Killing Floor, which worked fine. Any ideas?