Big.Wayne said:You need a good heatsink, that's the main factor.
Do not buy a Arctic Cooling Freezer 7/64 Pro, they really are total ****[Please star out swearies]
Why is it no good?
Im running my E6300 at 3.15 Ghz with an AC F7 pro and my temps dont go above 43 C, even with my rubbish case and high system temps.
For the money I dont think it can be beaten, sure other £40 coolers might shave a few degrees off but unless your really going hardcore OC save yourself some money.