Tech Knowledge Arena takes a close look at the effect four cores has on gaming in their new review.  They pit the 3.0GHz C2D E6850 against the 3.0GHz C2Q QX6850, while keeping all other components the same, and then started in game benchmarks.  See if the extra ~$1000 really does get you serious performance, or is you are better off picking up a higher clocked dual.

“One of the biggest misconceptions about CPU manufacturers increasing the number cores, is that the performance of the CPU increases by the same measure. Is this really the case? Are you going to see any real world performance differences by spending five times the amount of money on an Extreme Edition CPU? We will not only show you real world and synthetic benchmark figures but we’ll show you what the CPU cores are doing during these tests.”

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