Fractal DesignSilent Series R3 White - Silent computer fan - Optimized for quiet operation - 92 mm - Rotational speed 1500 RPM - Black ribbon cable - Rifle bearings - 12v - Black/White (Single)

Replaced 5 fans in my server with these, and now I barely hear it when it's on. I hear the hard drives spinning more than the fansAs a new reviewer on Amazon would you mind marking as useful or not useful so I can improve if needed!

The Fractal Design Define series PC cases come with two preinstalled fans (one at the back and one in the front) so I bought one more of these fans and placed it in the front (so that now I have two in the front and one in the back). The effect on my CPU core temps (when compared to my previous 2-fan setup) was a mere reduction of 0.5˚C. I am pretty sure, however, that if I place the fan at the top of my case rather than in the front, the reduction in the CPU core temperatures will be around 2˚C - but as this will require me to take off the sound dampening foams from the top of my case I won't do it. Anyway, despite the rather marginal improvement on the CPU core temps, the airflow inside the case has undoubtedly improved and this will have a positive effect on the longevity of the motherboard and the things installed on it. The GPU temps, for example, were reduced by 2˚C.In order to power this fan you will have to connect it on the motherboard (on a 4pin or a 3pin male connector). If you own a Fractal case (or any other case offering voltage control) you also have the option to connect it with the voltage controller at the front of the case. You will need to buy a 3pin splitter for this ( it is cheap though - costs about £1.90). My only gripe with this fan is that it does not have a 4pin female connector and therefore it is not PWM controlled. Its connector is only a 3pin one and as such the fan is only voltage controlled.All in all, I can recommend buying one of these Fractal Design Silent Series 3 140mm case fans. It just costs £8, it is silent, you get improved airflow in the case, and a reduction of 0.5˚C-2˚C on your CPU and GPU temps. I would definitely recommend it to those owning a Fractal Design Define S, R4 or R5 case as it matches the fans that are already pre-installed. Also in case you have bought one of those budget cases that come with only one fan at the back then you should absolutely consider purchasing at least one fan for the front as this will reduce your CPU and GPU temps by at least 10˚C.

Many of you think that quiet is better but you are all wrong.If you have a fan spinning at a very low rpm like this one does then it is not any good.You need to hear air circulating and if you cannot then it is not working well.Do you expect propellers on an airplane to spin quietly? NO! you do not.The reason these are quiet (like any so called quiet fan) is because they are not good for moving air as they are too darn slow. It is okay for some of you to say "wow these are quiet" but honestly these are useless.Do not try to tell me any difference because I know from experience these are useless.Just remember! a fan is no good if you cannot hear it moving air. These things you have to put up with if you have a top of the range PC. I bought this for my dehumidifier and it is totally useless for it. I dehumidifier has a heatsink and fins like any computer. Had I have not had to cut the wires and use the + & - wires I would have returned it for a refund but now it is useless piece of junk and I did make sure there were 12 volts and not 5 volts for the power.If you want a good fan then you have to pay for one but this in my opinion is cheap Chinese and not worth 50p.Anyone can buy a cheap fan and stick silly round stickers on it and then sell it and make it look good but these are totally garbage.Anyone says otherwise I will never believe them.

Excellent fans. I have a Fractal Define R5 case which was supplied with 2 of these. I was so impressed that I've decided to fill the rest of the fan mounts with the same. They are silent as described. Well, if I remove the front fan filter (to expose the front fans), I cannot hear them above the general hum of the other components.They are large so provide plenty of air flow without having to spin too fast. Combined with the Fractal case acoustic insulation and the case is more or less silent with 5 of these shifting air.I like the tidy design too. My case is sealed with acoustic insulation and is under my desk so no windows and no cheap looking LEDs :).

Bought this to fit below my 970 GPU in a Fractal R6 tempered glass case by modifying the expansion slot covers which is really easy to do. Thus the GPU is assisted in its venting out heat and runs cooler. 60mm would have been even easier but airflow would be less and noise probably greater, the 90mm option fan would have been 10mm too big. The fan runs at full speed is really efficient and super quiet and a great price after getting a Fractal R6 case with 3 fans fitted as standard I'm getting to be quite a fan of Fractal fans (excuse awful pun) preferring them to the Noctua's I have always bought. They have the right balance to noise ratio to output if you want a quiet but efficient case at very reasonable prices.Result I have now turned my GPU back to default passive mode at idle rather than constant 30% and it stays at 35c until I start gaming then 65c - 68c is the norm with intensive games.

I think I got a bad one. To be honest I should have sent this back immediately as it was no quieter than my old, very cheap, fan. In the last few weeks it has become so noisy that I put the old one back. Unfortunately it's now beyond the return period.Update... I contacted Fractal Design directly and found them to be extremely helpful. I now have a quiet replacement and they have a 4 star review instead of 1!

I'm a fan.

These things are great, and are pretty quiet even at full belt. I have four of them in the back of my TV cabinet (I only refer to it that way because that was its original purpose), attached to a thermostatic switch that stops my HTPC, Blu-Ray and Amp from cooking each other in the summer if I'm gaming. When they come on it's difficult to hear them if you've got music or a game running, although you do notice when it's silent. That said, who will have 4 running at the same time in NormalLand?