I just upgraded my PC with an 8800gt video card and a new motherboard from msi. The board will allow lots more overclocking versus the old asrock board that I had. I mostly play first person shooters like Bioshock, Jericho, Unreal Tournament 3, Crysis, etc. Would overclocking the 6400 core 2 duo cpu in my pc make much difference in gaming? How complex would it be to get the overclock to around 3 ghz, and would I need a better heatsink and fan versus the stock cooler?