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 1 Million Digits: (sec) Seconds 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 955 Black Edition 21.699 AMD Phenom II X3 720 Black Edition (DDR2) 24.5 AMD Phenom II X3 720 Black Edition (DDR3) 24.398 AMD Phenom II X2 550 Black Edition 22.24 AMD Athlon II X2 250 25.865 8 Million Digits: (sec) Seconds Ranking Intel Core i7 920 173.92 Intel Core 2 Duo E8500 190.538 Intel Core 2 Duo E8400 198 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 X2 250 288.464 16 Million Digits: (sec) Seconds Ranking Intel Core i7 920 384.78 Intel Core 2 Duo E8500 422.51 Intel Core 2 Duo E8400 426 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 X2 250 637.423

Although it isn't multi-threaded, Super Pi still loves the Core i7 920 processor and Intel's instruction sets. The closest competition here is not from AMD's quad-core processor, but instead from Intel's own Core 2 Duo E8500

wPrime 2.0	Source: WPrime

wPrime uses a recursive call of Newton's method for estimating functions, with f(x)=x²-k, where k is the number we're sqrting, until Sgn(f(x)/f'(x)) does not equal that of the previous iteration, starting with an estimation of k/2. It then uses an iterative calling of the estimation method a set amount of times to increase the accuracy of the results. It then confirms that n(k)²=k to ensure the calculation was correct. It repeats this for all numbers from 1 to the requested maximum.

Lower calculation times are better. wPrime is multi-threaded.

wPrime 2.0 32 Million Digits (1 thread): (sec) Seconds Ranking Intel Core i7 920 51.156 Intel Core 2 Duo E8500 50.466 Intel Core 2 Duo E8400 53.64 AMD Phenom II X4 955 Black Edition 45.115 AMD Phenom II X3 720 Black Edition (DDR2) 52.354 AMD Phenom II X3 720 Black Edition (DDR3) 51.901 AMD Phenom II X2 550 Black Edition 48.173 AMD Athlon II X2 250 49.827 32 Million Digits (2 thread): (sec) Seconds Ranking Intel Core i7 920 25.828 Intel Core 2 Duo E8500 25.49 Intel Core 2 Duo E8400 27.078 AMD Phenom II X4 955 Black Edition 22.682 AMD Phenom II X3 720 Black Edition (DDR2) 26.537 AMD Phenom II X3 720 Black Edition (DDR3) 26.256 AMD Phenom II X2 550 Black Edition 24.242 AMD Athlon II X2 250 25.007 32 Million Digits (3 thread): (sec) Seconds Ranking Intel Core i7 920 23.297 AMD Phenom II X4 955 Black Edition 15.46 AMD Phenom II X3 720 Black Edition (DDR2) 18.219 AMD Phenom II X3 720 Black Edition (DDR3) 17.936 32 Million Digits (4 thread): (sec) Seconds Ranking Intel Core i7 920 13.954 AMD Phenom II X4 955 Black Edition 11.84 32 Million Digits (5 thread): (sec) Seconds Ranking Intel Core i7 920 13.047 32 Million Digits (6 thread): (sec) Seconds Ranking Intel Core i7 920 11.532 32 Million Digits (7 thread): (sec) Seconds Ranking Intel Core i7 920 10.297 32 Million Digits (8 thread): (sec) Seconds Ranking Intel Core i7 920 9.547 32 Million Digits (all thread): (sec) Seconds Ranking Intel Core i7 920 9.547 Intel Core 2 Duo E8500 25.49 Intel Core 2 Duo E8400 27.078 AMD Phenom II X4 955 Black Edition 11.84 AMD Phenom II X3 720 Black Edition (DDR2) 18.219 AMD Phenom II X3 720 Black Edition (DDR3) 17.936 AMD Phenom II X2 550 Black Edition 24.242 AMD Athlon II X2 250 25.007

wPrime really shows what's capable with HyperThreading. While the Phenom II is actually a little more efficient core-for-core against the Core i7 920, being able to use the eight logical cores of the Core i7 920 through HyperThreading allows it to claim the fastest speed overall.