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 (multi-threaded) lower better 32 Million Digits (1 thread): (sec) Points Ranking Intel Core i7 920 50.672 Intel Core i5 750 48.844 Intel Core 2 Duo E8400 53.93 AMD Phenom II X6 1090T 40.14 AMD Phenom II X6 1075T 41.62 AMD Phenom II X4 970 Black Edition 40.778 AMD Phenom II X4 965 Black Edition 42.073 AMD Phenom II X4 910e 54.616 AMD Phenom II X2 555 Black Edition 46.91 AMD Athlon II X4 645 46.256 AMD Athlon II X4 635 50.84 AMD Athlon II X4 620 54.509 AMD Athlon II X3 435 50.607 AMD Athlon II X2 240e 51.636 32 Million Digits (2 thread): (sec) Points Ranking Intel Core i7 920 25.531 Intel Core i5 750 24.571 Intel Core 2 Duo E8400 27.05 AMD Phenom II X6 1090T 20.282 AMD Phenom II X6 1075T 20.826 AMD Phenom II X4 970 Black Edition 20.718 AMD Phenom II X4 965 Black Edition 21.684 AMD Phenom II X4 910e 28.267 AMD Phenom II X2 555 Black Edition 22.244 AMD Athlon II X4 645 23.243 AMD Athlon II X4 635 25.022 AMD Athlon II X4 620 28.546 AMD Athlon II X3 435 25.163 AMD Athlon II X2 240e 26.707 32 Million Digits (3 thread): (sec) Points Ranking Intel Core i7 920 16.984 Intel Core i5 750 16.629 AMD Phenom II X6 1090T 13.79 AMD Phenom II X6 1075T 14.133 AMD Phenom II X4 970 Black Edition 14.229 AMD Phenom II X4 965 Black Edition 14.633 AMD Phenom II X4 910e 19.11 AMD Athlon II X4 645 15.849 AMD Athlon II X4 635 17.067 AMD Athlon II X4 620 18.813 AMD Athlon II X3 435 17.487 32 Million Digits (4 thread): (sec) Points Ranking Intel Core i7 920 13.047 Intel Core i5 750 12.698 AMD Phenom II X6 1090T 11.75 AMD Phenom II X6 1075T 12.607 AMD Phenom II X4 970 Black Edition 11.217 AMD Phenom II X4 965 Black Edition 11.404 AMD Phenom II X4 910e 14.711 AMD Athlon II X4 645 12.573 AMD Athlon II X4 635 13.26 AMD Athlon II X4 620 14.743 32 Million Digits (5 thread): (sec) Points Ranking Intel Core i7 920 12.313 AMD Phenom II X6 1090T 9.717 AMD Phenom II X6 1075T 10.375 32 Million Digits (6 thread): (sec) Points Ranking Intel Core i7 920 11.219 AMD Phenom II X6 1090T 8.547 AMD Phenom II X6 1075T 8.985 32 Million Digits (7 thread): (sec) Points Ranking Intel Core i7 920 10.64 32 Million Digits (8 thread): (sec) Points Ranking Intel Core i7 920 9.766 32 Million Digits (all thread): (sec) Points Ranking Intel Core i7 920 9.766 Intel Core i5 750 12.698 Intel Core 2 Duo E8400 27.05 AMD Phenom II X6 1090T 8.547 AMD Phenom II X6 1075T 8.985 AMD Phenom II X4 970 Black Edition 11.217 AMD Phenom II X4 965 Black Edition 11.404 AMD Phenom II X4 910e 14.711 AMD Phenom II X2 555 Black Edition 22.244 AMD Athlon II X4 645 12.573 AMD Athlon II X4 635 13.26 AMD Athlon II X4 620 14.743 AMD Athlon II X3 435 17.487 AMD Athlon II X2 240e 26.707

Wprime fills in where SuperPi leaves off, allowing PCSTATS to stress one core, or any number of cores up to the total amount in the processor. The CPUs benchmarked here range from two to eight threads, so the most important result set to pay attention to is the final block (all threads).

With all four of its threads unleashed, the 3.1GHz Athlon II X4 645 is competitively paced against Intel's Core i5 750 (about dead even) and just three seconds off the low calculation time of the eight-threaded Core i7 920, Phenom II X6 1075T and 1090T CPUs.