Noctua NF-A14 FLX 140mm Ultra Quiet Cooling Fan 900-1200RPM 115.5M3/H 19.2DBA 3-PIN

Comment:
These are great high quality fans for use in your case. They push a good amount of air without making a lot of noise. They have good static pressure as well so they are nice for intake fans with dust filters. If you don't require PWM definitely go with this version.I ordered 4 of these and one had vibration issues, but was easily replaced.

Comment:
Using it for Exhaust with Corsair H90 in a Corsair 550D. Works quite well and isn't very loud unless over ~1200RPM. Does make an annoying noise at times when at around ~900RPM though. Seems to move air pretty well and should last for sometime since it's a Noctua Fan.

Comment:
While these are excellent quality fans, I could not recommend them for radiator use (used on a SR-1 560)Problems: Cannot be used in "push" with fan filters, as the blades stick out slightly, and will rub on the filter. If you change the fans to "pull" you will loose a few degrees, and the fans will get quite loud. The "Anti-Vibration Pads" will cause a gap b/w the frame and the radiator, so you will loose some pressure there unless you remove them or seal the gap somehow.In my opinion, these are glorified chassis fans, and that water-cooling enthusiasts should look elsewhere.

Comment:
This is my first noctua fan. I used it for case exhaust. I could not beleive how quiet it runs. Im definatly buyinh more.

Comment:
Just got this babies installed and they are just like the rest of the Noctua products,absolutely awesome. I'm thrilled to have 7 of their products (5xNF-P12 and 2xNF-A14) cooling my gaming beast. Noctua all the way!