Yes, E7500 (3M Cache, 2.93 GHz, 1066 MHz FSB) is much faster than E4300 (2M Cache, 1.80 GHz, 800 MHz FSB). You will definitely see an increase in performance if you are playing games or doing other things. But I do suggest you get a quadcore if you have the budget, go Corei5 with the Quadcore model. But if you would like just the Core2Duo E7500, then increase your ram if you can. 2gb is good enough but 3gb is better or go 64bit OS to benefit more ram if you like going 4gb or 6gb. Also a good video card like for example GTX460 would definitely boost your PC's performance.