That right there is a perfect example of marketing video that proves nothing. I have tested the silverstones on a radiator and my $5 yate loon pushed more air through per dBA.
The whole box and smoke machine visual is marketing at it's finest. From what I can tell in testing on a radiator, it has zero effect on radiator thermal performance. perhaps there is some benefit in case fan setups where you really need to point the air at something, but I just haven't found utility or real world benefit. I have come to the conclusion that any fan video that doesn't include noise level measurement is purely a sales pitch. More specifically any measurement of noise that's not with the fan mounted to something like a radiator or fan is also worthless.
Don't let them fool you, what "looks cool and different" in no way relates to noise performance. Air flow through a radiator per noise level is ultimately the one and only performance measure that relates to something useful and notice how those marketing videos avoid that.
I have found that most of those "features" such as wavy blade shape, notches in the frame, perforations in the frame, are all a bunch of crap and do nothing.
The art of sales. If they REALLY made something special, where is the sound level meter to demonstrate what matters? Instead you get a smoke machine stuck in a cardboard box and somehow this is supposed to relate to thermal performance at low noise levels?
The penetrator I tested was a terrible radiator fan. $5 yate loon tested better. Not even remotely close.
Haven't tested the cougar but I haven't seen promising performance figures from anyone that bothered to measure noise...would like to try one, but I don't expect it to do that well on a rad.Edited by Martinm210 - 4/11/13 at 5:53am