ASUS Z9 PE-D8 WS Dual Xeon Insanity E5-2660 & E5-2687W
The Unigine Heaven benchmark, much like 3D Mark, is designed to really push your system to the limits and we have obviously found them. The only real variance is in the minimum frame-rate where the poor core speed of the E5-2660 cannot keep things running smoothly. Ramping up the image quality to 8x MSAA gives a 2FPS difference at max between the three (five) CPUs, and 0.7 FPS average. The HD7970 is the bottleneck here then.