I am currently using the H50 stock fan. I am searching that my cooling is not sufficient for my experience. I am hitting 66-70C loads in Linux among a 4GB difficulty size. Seal is IC 7, though I did break it one time to check a difficulty. Temps rose only 4.2 C after though. I have a resalable plans when they acquire new fans. My case does not fit the Scythe Ultra Kaze things "push / pull, and that clash with the H50. 38 mm fans are not working, must be the same thickness as the fan that came with the PC (29?). Only one of the fans sound like a jet engine, but it cools very well! Difference of 15-20C, so it would be willing to TRY to stop it .. Somehow. What I'm looking into a set of push / pull fans is a balance between calm and performance. I would also like to control PWM functionality noise, but it is something like a luxury.