OCC has published a review on the Mushkin Ridgeback 998827 PC3 12800 3x2GB memory

When it came to the Ridgeback kit the limit was an amazing 28% frequency increase. This allowed for an additional 449MHz, for a total speed of 2049MHz. Not too many set's out there can reach beyond the 2000MHz mark, so this is very impressive showing, but equally impressive is that they scaled this high with the CAS latency remaining at 8. With this being the case end timings were 8-10-9-29, a command rate of 2T, with the voltage needing to be set a 1.68 to fully run stable.

Mushkin Ridgeback 998827 PC3 12800 3x2GB Review