Test System Setup
If you skipped over the last page and headed straight to the benchmarks, the main pieces of information you really need to know are above. We've dropped the 21x multiplier on the i7 860 to 20x to line up with the i7 920 which gives us a 4GHz clock.
As for the memory, we've relaxed the timings slightly from the 6-6-6-24 setup on the Tri-Chan kit to 7-7-7-24 to be in line with the Dual-Chan kit. While we'll be using our standard RAM line-up, we've added Resident Evil 5 along with CINEBENCH R10 to complete the lineup today.
Our aim is to make both systems as close to each other while using different chipsets. Our RAM is clocked the same, both use the same VGA card and drivers and both CPUs are also clocked at 4GHz.
Let's get started!
Important Note: When modules are overclocked we adjust the BCLK which not only lets us fine tune the MHz out of a module but in turn increases the overall CPU clock speed. While we always make the effort to include the BCLK and CPU Speed in our graphs please just make sure that you make note of these when looking at the results, in some tests that don't purely test the memory speed the extra MHz on offer from the CPU can increase the result. Of course it's worth noting that having faster memory gives you the ability to run your CPU at a higher speed.
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.
wPrime is a benchmark that heavily focuses on the CPU; it shows both setups performing very similar. The X58 one does slightly edge out the P55, though.