I am planning to buy a XFX 8800GTS 320Mb and become doubtful when pairing that GPU to what CPU they will work at the best performance. Noted that I will use my system for gaming all the time. How much performance difference will result if I am going to pair it with E4400 and E6420?
Pick a C2D any C2D and you will be fine. You only come close to limiting yourself is you go with an old single core CPU.
How much percentage difference between E4400 compare to E6420 pairing with 8800GTS 320Mb? What about E4300 and E6320? It is huge? Or just merely 5% or something? Does it have any impact loss of FPS when I do it on gaming? Thx.
Not a chance dude, a 3500 can go up to x1950pro no problem and this is even on agp. Unless your motherboard *REALLY* sucks you can take it to an x1950xt even. You will feel some slight bottlenecking but only on the xt.