What woul you suggest in my case? i7-920, 5850 saphire 1 Gb, W7 64bit, 6 Gb. bought and built about 2 months ago. Games like Codmw2, Divinty2 etc. run like a charm. But i try Witcher enhanced and it displays loads of artifact (dx10) Mind you, the game plays corretly, its the displaying...