Earlier this week I purchased a nvidia vc and power supply to support it (450w). After installing the card and running the latest video driver I seem to be having major problems while playing World of WarCraft. The game loads fine but during game play my character tends to freeze or background flickers and disappears. While reading other forums similar to this problem many have one thing in common, a Asus sis chip set AMD board. I've re-installed nvidia drivers and dl'd sisagp update from sis.com.tw and still game play is horrible. Could really use some help...thank you. Asus A7s8x sis board, amd 3000 nvidia 6600 gt 128 512mb 450w ps 120 hd 3 fans since nvidia card tends to run at a high temp.