This article compiles the best benchmark results we collected of various CPU models using x264 HD Benchmark 4.0, a free CPU benchmark developed by graysky, Dashken and Adrian Wong. This CPU performance comparison guide currently covers 20 different CPU models plus another 283 CPUs in the older comparison but this is just the beginning. We will keep updating the results as new results come in, so please contribute your results.

If you would like to participate in this endeavor, head over to the x264 HD Benchmark 4.0 page and download a copy. After you obtain your benchmark results, simply post them in the official forum thread of x264 HD Benchmark 4.0. Please post your results even if your processor is already listed in the comparison. This is because we will use your results if they are better than the results currently listed in the comparison.

Here is the list of updates :
- Added six new pages of results based on the new x264 HD Benchmark 4.0.
- Added the Intel Core i5-2500K desktop processor (overclocked to 4.5 GHz).
- Added the Intel Core i5-2500K desktop processor (overclocked to 4.0 GHz).
- Added the Intel Core i7-920 desktop processor (overclocked to 3.8 GHz).
- Added the Dual Intel Xeon X5550 workstation processor (overclocked to 3.06 GHz).
- Added the Intel Core i7-875K desktop processor (overclocked to 4.0 GHz).
- Added the Dual Intel Xeon X5550 workstation processor.
- Added the AMD Phenom II X6 1055T desktop processor (overclocked to 3.5 GHz).
- Added the Intel Core i7-860 desktop processor (overclocked to 3.8 GHz).
- Added the Intel Core i7-870 desktop processor.
- Added the Intel Core i7-965 Extreme Edition desktop processor.
- Added the AMD Phenom II X4 955 Black Edition desktop processor (overclocked to 3.5 GHz).
- Added the AMD Phenom II X6 1055T desktop processor.
- Added the Intel Core i5-750 desktop processor.
- Added the AMD Phenom II X4 955 Black Edition desktop processor.
- Added the Intel Core 2 Quad Q6600 desktop processor (overclocked to 2.6 GHz).
- Added the AMD Phenom X3 8650 desktop processor.
- Added the Intel Core 2 Duo T6400 mobile processor.
- Added the Intel Core 2 Solo ULV SU3500 mobile processor.
- Added the Intel Pentium M 725 mobile processor.
- Added the Intel Atom N270 mobile processor.



Link: TechARP