Busa ji,
As ROC already mentioned and i have also mentioned that most of the games are not optimized for Quad Cores and higher clocked Dual Core is much better.So it is benificial for you to go for a cheaper ,lesser clocked CPU with a better GPU. The ATI 3850 and 3870 are really impressive cards with low costs.
So if you get an E6550 or even E4500 or so, you can overclock it easily with a good motherboard like Abit IP35-E. |