KEYFANCLUB 120mm x 25mm 12volt Computer Fan 2-PIN Dual Ball Bearing Brushless DC Cooling Fan

The molded mounting struts for the motor - the plastic bits that hold the motor into the frame - they cast them in a semi-involute shape with a camber so as to create a stator blade.Jet engines use a rotor (fan) and a stator (un-moving fan) of given dimensions to compress air.This fan is constructed that way - it increases the static pressure of the exiting air. This is a 12v case fan that can actually pressurize a container - not much pressure, but more than a normal fan its size, and better than a bilge-blower that costs twice as much!I am very happy - provided they don't die for bearings or windings. GREAT design! Make a whole line of these in different sizes! PERFECT!

I have a Seasonic PSU for my FreeBSD server. The fan in the PSU was apparently some sleeve bearing that wore out, because it started making a pitter-patter sound. Figured it was cheaper to replace the fan than the whole PSU, so I got this fan. Works great. It looks almost identical actually---the shape and number of the blades, for example, is exactly the same. I don't notice any significant noise, and if it's truly a ball bearing fan (I didn't actually check it before I installed it) as advertised, this is a really super value.Thumbs up.

The media could not be loaded.  I love this fan! I had issues keeping three RTX8000 passive cooled GPUs cool inside a 4U server, they kept hitting 75-80c under low load and 90c running rapidsai. I bought this to use as a blower behind the GPUs and have not seen Temps rise above 45c. It's loud, but it's meant for a server and any data center server room with active cooling is loud. My Homelab server rack sits in another room.

This thing blows like a tornado and is as loud as your girl screaming at you in a concert/festival for checking out other chicks… def keeps your electronics cooler than a Ice cube in glacier pond. Was made for server racks but I have keep the plug near the door panel for intense gaming so I can easily turn it off and on when needed 🤣

Unlike some DC motors if the positive and negative leads on this fan are reversed, it will not run. Since the fan plugs into a circuit board and the plug will only go on one way if the leads are reversed in that little plug the fan won't run.I wonder how many thousands of these were made before anyone noticed?Anyway, too bad the wiring was screwed up. Otherwise it looks like a good fan.

I bought this to use on my Ender 3v2 3d printer as a motherboard fan installed in a 3d printed cover. It was plug and play into the motherboard and, is a powerful fan, and relatively quiet. A significant upgrade to the small stock fan. However it lasted only a few weeks, so i question its reliability.

Picture 1: is the connector on the old fan that I’m trying replace.Picture 2: is the connector on the new fan. Note the positive and negative wires are reversed.It might not be working because the polarity is reversed?Otherwise, shipping was right on time, and I received everything that I expected. When I (manually) twirl the fan, it seems silent (@180rpm)! 😊. I hate giving bad reviews and wish the fan would work!

The dimensions are accurate as specified. I am satisfied with the airflow however the trade off is that the fan is audible and not suited for a “silent” application. I attempted to use the fan with a PWM motor speed controller but found it to not be compatible and would only operate at max speed.