Cooler Master GeminII review @ bit-tech.net
 

Arguably the most interesting comparison to be made was the
performance difference between the Noctua NH-U12F, which was using only
one NF-S12 fan at 600RPM, and the GeminII. The GeminII trailed the
NH-U12F by almost six degrees, which doesn't bode well for the GeminII's
cooling efficiency. Even though the Noctua NH-U12F has some installation
headaches, we don't think that this pitfall outweighs its otherwise very
good performance.

I'm sure with more powerful fans, we'll see more incremental performance
improvements with the GeminII, but those gains would come at the expense
of noise - the same could be said about the Noctua NH-U12F, too. With
the fans we've tested the heatsink with here, the Cooler Master GeminII
is a reasonably good silent cooling solution, but it's not a great one.




http://www.bit-tech.net/hardware/200...ster_geminii/1