DV Hardware just published a new review on the SilverStone FM123 fan
A quote from the article:
SilverStone FM123 fan review
SilverStone recently released a couple of new fans, the SST-FM and SST-FN series. The first series features adjustable fan speeds while the latter ones have fixed fan speeds. In this review I'm taking a closer look at the high-performance SilverStone FM123 120mm fan which comes with a small fan controller that allows you to adjust the fan's RPM.
SilverStone FM123 fan review