I heard that CL4 on MIVE isn't actually CL4, not sure if it's the same with Gene-Z. Same goes with CL5 too. I can do CL4 as well, but it gives the same time in SuperPi 1M as with CL6 Take a look at here: http://www.xtremesystems.org/forums/showthread.php?267324-G.Skill-RipjawsX-F3-17000CL8D-4GBXMD . They are talking about the "maximus bug".
Screenshot with 3DMark score, subtest scores, 3DMark settings, CPU-Z (cpu+mem at least) and GPU-Z (dropdown must be visible if you run in SLI or Crossfire). I suggest to take a look at the Rules & Guides