The 6950X is a great CPU but, the 5960X at 4.5Ghz is faster by about 12-15%
This is however comparing a, "4.5Ghz" overclocked 5960X, to a "3.0Ghz" stock 6950X.
Also, single thread performance running 1 core, at the same 3ghz on each CPU. The 5960X was actually slightly faster. And higher fps...