I have a pc with following specs core2duo E7500 @2.93 Ghz ,4 gb DDR2 RAM @ 1066 and a 500w supply . i want to upgrade my old 9600 GT , will a HD 6850 will be bottle naked by it . if i will upgrade it to a core2quad Q8400 @ 2.66 Ghz , can it handle 6850 , GTX 560 ti . my aim is to run games @ 1600 *900 at low to medium settings @ 30FPS for maximum of 2 yrs .