Originally Posted by dkev
I disagree with your statement about the R4's. Regardless of your test. R4 has 3.1mmH20. That's monster static pressure for a 1800 rpm fan. I can tell you I can feel solid air movement from the R4 after it's pulled air through the rad,in conjunction with a shroud, from 18" away. I will put the R4 up against any 1800 RPM 120mm fan out there with the H50 rad.
Static pressure is much like HP on a car, everyone can give a number, but line em all up at the same time on the same machine and for some reason nobody can every match that number... Gotta take any manufacturer spec with a grain of salt. Not to say the R4 isnt a good fan, but if your going to use it, it HAS to be with a shroud, as this thing loves flinging air out all over the place, not a very good stream un-shrouded. (Also have to consider the shroud effectively increases operating pressure of ANY fan you pair it with). Put this thing up against an Ultra Kaze 2k and see who wins that match. Sure its 38mm, but it is a 120mm, and same speed, 2k RPM.