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.
Under wPrime we can see performance is best when our CPU is clocked to almost 4GHz. At less than 4GHz we see the Kingmax kit beat out the G.Skill. Here it carries a slightly higher clock speed again, though, which is what wPrime really benefits from.