The Core 2 Duo E8500 does extremely well for Call of Duty at stock and at overclocked settings - it is only slightly beaten when overclocked by the quad core QX9770 running 25MHz faster.
Commanche 4
Again, the E8500 does extremely well at stock and at overclocked speeds. And by the way, you can discount the top score in this chart -- in this benchmark the E6600 processor was using a faster different video card than the rest.