I just replaced a eVGA 8800 GTS with an XFX 6850 on a Windows XP system having a QX9650 3.0 GHZ Core 2 Quad processor. The gaming performance is much better as expected. However I am noticing a glitch while running Windows XP. Sometimes the application windows don't refresh fully. Like if I move an Internet Explorer window around the screen (and partially off screen), it may come back not looking correct until I force a refresh (place another window over it). It doesn't always happen. I am running the latest Catalyst Drivers 10.10b (10.10c is only for Windows 7 right now). Anyone find a similiar issue?