Sisoft Sandra XII benchmark utility just came out a couple months ago and we have started to include it in out benchmarking. With Sandra XII you can now easily compare the performance of the tested device with its speed and its (published) power (TDP)! Sandra XII also has SSE4 (Intel) and SSE4A (AMD) benchmark code-paths, which is great for those of you testing next-generation AMD & Intel chips.
Results: Sandra XII 64-bit showed that the AMD Athlon 64 X2 6400+ is still king of the hill when it comes to memory bandwidth thanks to the intergrated memory controller. The Intel QX9770 does seem to have improved memory bandwidth over the QX6850 and QX9650 thanks to the improved front side bus and clock speeds, so no complaints there.