I'm using the 6750 also due to best bang for the buck, even with Vista Home Pro, it's very quick. I almost got the Ball mem with the lights, but as I have a closed box, saved the 70 bucks and went without. I don't know if was my board (ASUS P5nesli) or not but I had problems loading XP with 2 gig of RAM. Recommend using 1 stick till all programs and updates are installed, then add second.