Looking to only upgrade my GPU. As the topic title states, which is faster? I know the GTX560 Ti is at least $20 more. Is the extra $20 worth it? So I am going for the CHEAPEST versions of both cards. A referenced GTX560 Ti (EVGA), and a referenced HD 6870 (Sapphire). There is no Overclocking intended. I really don't think I need to for the games I play, and will be playing. AND Will my PSU need to be upgraded to 750Watts? I do plan to OC my CPU to 4.0Ghz once I've gotten the new Video Card. RAM will also be Overclocked as well.