12cm 120mm 200CFM 4000RPM CPU Cooling Fan FFC1212DE 12V DC 3-Pin 3-Wire PC Computer High CFM Cooling Case Fan with Metal Finger Guard Grill

VERY IMPRESSIVE! I've seen shop fans that didnt put out this much air. I thought I was going to have to strap my pc down, if it had wings, i definitely would have!Ok, seriously, this thing puts out a LOT of air, AND a LOT of noise. The two go hand in hand, as we all know, or should know..... The main issue with it is that it doesn't run at lower than about 48% power, that's over 2000 RPM! So yeah, you will hear it! Anything lower than that just wont get it spinning. If you want to avoid the noise as much as possible, you may end up setting a rather aggressive power curve, like 50% at about 55°c or about 131°F. This will generaly keep it off until you really need it.Before adding this fan, I ran the P95 stress test on my machine and at about 2.5hrs, my cpu overcame my liquid cooling and my system shutdown due to overheat. I added this fan to pull more air thru my radiator and into my case and man does it work great!! Because my curve is set rather high, and the heat built up so fast, before the fan could spin up, my system reached 175° in a matter of seconds when I ran P95 again. But the fan brought it back down to about 155° in about 15 seconds at full power and the temp was still slowly dropping as I shut down the stress test. For comparison, I have an Intel i7 4770 overclocked to 4ghtz.Rendering large 3D scenes and processing video are no problem. My system used to go from 115° warm idle to 145° when rendering scenes and slowly climb to about 155° max. Not it idles at about 98° and never reaches higher than about 135° unless I'm benchmarking or stress testing. I can certainly deal with the noise, as well as, the reassurance that if its air that my system needs, its readily available in large quantity!Asus fan control marked it at a top speed of 4337rpm. And a power range of 30% to 100%. If its spinning the power can be brought down to about 40%. But from a full stop, anything less than 48% wont get it going.

These fans are great!! They move lots of air and are strong. They are noisy but for their size, amount of air they move, and cheap cost make them a winner!

this is a VERY good fan and douse what its supposed to. most people wouldn't have a need for a fan like this because its so huge, if you have a liquid cooler or you have a home server or just generally want to control some very aggressive temp spikes this fan can take care of that for you. it is pretty loud when its at full blast but if you lower the speed (since its a 3 wire fan you can only do so in software by adjusting the voltage) it pushes an adequate amount of air at a tolerable volume. I've found that it only has about 50% control though, if you try and lower the fan below 50-51% it will just stop spinning. the fan douse not appear to be defective in any way and its likely just my software choice that's to blame for the quark.a nice touch for this fan is that it includes both m4 screws and a metal grill cover, though I had to use my own screws because they where incompatible with my cooling loop. I would recommend that anyone buying this fan invest in some anti-vibration spacers because it can quite literally shake its self off your case unless you lock-tight/Teflon-tape the screws in place when its running all out. mitigating that vibration would be good in the long run just to preserve the life of the fan as well as your sanity in case something else develops a rattle...

Works amazingly but is definitely loud. I have a full sized desktop and I was worried it would start propelling forward lol. I use it as an exhaust fan and it sure keeps it cool

This might not matter to you if you use the machine screws it came with or you have studs long enough to go through the entire assembly. If this is the case, this thing is pretty good and very powerful but also very loud at full speed.I had to use it for an OEM design application where PEM studs weren't available in the length of the fans chassis, so now I have to look around for another one... but when I look, all of them seem to be changing the design and now I can't use it (or any others) in a flush surface mount application with short PEM studs.China's manufacturers selling here have a habit of modifying and discontinuing things so there's no point using them in OEM applications or in prototypes. The worst part is that they sometimes make sweeping changes across an entire industry for no good reason at all...End result: good for a replacement, but don't rely on manufacturers here if you need a steady flow of them without having to change your product design to meet their often senseless changes and disappearing items.

This thing is anything but silent but it is fast and cools very well. If you don't have it screwed down it's going to take off like a helicopter.

Bought this fan to increase circulation in our dogs travel crate and boy does it move air. Unfortunately we haven't been able to test it on the crate itself yet as the fan was missing the grill that was supposed to be included, and the blades are definitely moving fast enough to take off a curious puppy tongue or even a finger.The fan is also VERY loud, but that's not a problem for what we're using it for.