Super Pi Mod 1.5	Source: SuperPI

SuperPI calculates the number PI to 1 Million digits in this raw number crunching benchmark. The benchmark is fairly diverse and allows the user to change the number of digits of PI that can be calculated from 16 Thousand to 32 Million. The benchmark, which uses 19 iterations in the test, is set 1 Million digits.

Lower calculation times are better. SuperPi is not multi-threaded.

Super Pi Mod 1.5 XS - Windows Vista 1 Million Digits: (sec) Ranking Intel Core i7 920 13.516 Intel Core 2 Duo E8500 14.8 Intel Core 2 Duo E8400 15.5 AMD Phenom II X4 965 Black Edition 20.343 AMD Phenom II X4 955 Black Edition 21.699 AMD Phenom II X3 720 Black Edition (DDR3) 24.398 AMD Phenom II X2 550 Black Edition 22.24 AMD Athlon II X4 620 29.749 AMD Athlon II X2 250 25.865 8 Million Digits: (sec) Ranking Intel Core i7 920 173.92 Intel Core 2 Duo E8500 190.538 Intel Core 2 Duo E8400 198 AMD Phenom II X4 965 Black Edition 256.011 AMD Phenom II X4 955 Black Edition 269.615 AMD Phenom II X3 720 Black Edition (DDR3) 301.923 AMD Phenom II X2 550 Black Edition 275.19 AMD Athlon II X4 620 324.164 AMD Athlon II X2 250 288.464 16 Million Digits: (sec) Ranking Intel Core i7 920 384.78 Intel Core 2 Duo E8500 422.51 Intel Core 2 Duo E8400 426 AMD Phenom II X4 965 Black Edition 574.844 AMD Phenom II X4 955 Black Edition 606.372 AMD Phenom II X3 720 Black Edition (DDR3) 671.513 AMD Phenom II X2 550 Black Edition 622.79 AMD Athlon II X4 620 720.455 AMD Athlon II X2 250 637.423

Any advantages the 2.6GHz Athlon II X4 620 processor may possess from its native quad-parallelism evaporate in this single-threaded test, since it's positioned against processors with faster clock speeds, more L2 and L3 cache, or better instruction sets. If you're running applications that are primarily single-threaded, the Athlon II X2 250 is not going to be as fast as AMD's Phenom II X4 series or even Intel's Core 2 Duo/Core i7 processors.

Super Pi Mod 1.5 XS - Windows 7 1 Million Digits: (sec) Ranking Intel Core i7 920 15.313 Intel Core 2 Duo E8400 15.553 AMD Phenom II X4 965 Black Edition 20.343 AMD Athlon II X4 620 29.828 8 Million Digits: (sec) Ranking Intel Core i7 920 171.781 Intel Core 2 Duo E8400 196.529 AMD Phenom II X4 965 Black Edition 256.933 AMD Athlon II X4 620 324.667 16 Million Digits: (sec) Ranking Intel Core i7 920 375.969 Intel Core 2 Duo E8400 441.066 AMD Phenom II X4 965 Black Edition 576.64 AMD Athlon II X4 620 719.676

Interestingly, while the AMD Athlon II X4 620 shows next to no change in Super Pi (and remains the slowest processor here due to its low clock speeds), the Core i7 920 test system sees a slight improvement in calculation time when SuperPi is run under Windows 7 as opposed to Windows Vista (for 16M test specifically).