Sisoftware Sandra (System ANalyzer, Diagnostic and Reporting Assistant) is an information & diagnostic utility. It should provide most of the information (including undocumented) you need to know about your hardware, software and other devices whether hardware or software.

Here we see that the GeIL modules are already running ahead of the G.Skill modules across the board despite the additional 4GB and modules to overclock. We also notice that dropping the timings down at the stock speed makes a bit of difference, but nothing significant. However, when we crank up the speeds we see that the bandwidth starts to make a considerable jump at speeds at 1600MHz and above.