Was anything using the RAM while you were doing the test, like antivirus / folding / integrated graphics? (I can't call it a benchmark

) Also, I assume this is Windows 7? Vista capped its numbers at 5.9, so if you upgraded from Vista to 7 there may have been some strange registry thing left over.
The other thing I can think of is that your CPU may have went into low power mode right as it was testing the memory, and the excuse for a benchmark picked that up.
Just get CPU-Z and verify the RAM is working at the proper speed in the "Memory" tab. If your RAM is working properly, don't bother. (OT: can you still hack the registry to change those values?) Test with something that means a little more, like Cinebench, 3DMark, Folding@Home frame times, etc etc...