wPrime is a leading multithreaded benchmark for x86 processors that tests your processor performance by calculating square roots with 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.
wPrime doesn’t show much of a gain. This is a bit of a surprise as this is one of the programs we expected to show a big increase. wPrime is normally very dependent on memory bandwidth. The best gains were seen between the 2600K at 1333MHz and 2600K at 2133MHz where we dropped the calculation by almost a second.