SilenX is a Company that strives on Silent Computer Experience. Largely unheard of in enthusiast circles SilenX has a wide and varied selection of Cooling solutions that are available at most retailers online.
The Fan 
Opting for a more traditional approach we see SilenX has chosen a 7 Bladed Design, which is a typical approach really. However looking closely we see that not only is the Fan Hub smaller than normal but their Fan Blades exhibit a very Agressive sweeping pitch. Hopefully this will Aid in its Performance.
The Stats
Model:
IXP-74-14B Size: 120x120x25mm
Volts: 12v
Rated CFM: 72.0
Rated RPM: 1400
Rated DBA: 14.0
Installed and Running 
Right away we can see that SilenX has placed their LED's in the centre Hub as opposed to the outside ring. Although it still casts a menacing Glow when in operation.
The Results 
Measured RPM: 1395
Very good Results as well. It seems that SilenX is living up to its name for Performance.