Pros: -It will cool your computer case quickly -It is double ball bearing, so horizontal mounting a-okay -Spins fast

Cons: -The fan is about as thick as a regular case fan plus a half, so beware -When it was completely revved-up, it made my whole computer case shake like an unbalanced washing machine -It changed weather patterns in my community for a couple of hours until i made a good fan profile for it -Only a three pin connector

Overall Review: -You have a case cooling problem, this is the solution. You could have two of these blowing through a filter into your case, and it would overpower 4-6 other case fans depending on the airflow, and rpm's of the other fans. It is a beast! I only have one, and when it goes all super saiyan mode, it sounds like my computer has a turbine engine in it. It moves so much air that my other fans slow down because they cannot do anything to help this one fan show. I have three fans in (one of them being this one) and four fans out. Idling around 30% it is about as loud as my other fans, anything above that, it is fairly noticeable.

Pros: Very high RPM and CFM numbers. Really moves a lot of air even at 55%. Low price for a high CFM/RPM HAMP fan.

Cons: First high CFM / RPM fan I have tried and opted to try a Bgears fan. In a CM case with four other 120mm fans both Rosewill and CM at 2000 rpm, my temps were okay but I hoped a high CFM would make a bigger difference than the minus 1 or 2 C lower temp I am seeing but still a good value for what you get. Moves alot of air as a rear exhaust - 60-65% rpm and noise is tolerable still a bit loud, At front of case to push air anything above 50-55% was too loud. Since it is rated a 1.52 amps I connected it to the HAMP fan on my ASUS Prime Z270-A motherboard. Tried setting it for less than 50% and fan runs but hwinfo64 does not display it unless its above 50% - maybe that's expected, not sure so I keep it at 55%.

Overall Review: A good fan at a reasonable price, moves a lot of air but listed at Noise(dbA): 45, it was louder than I expected at high RPM, but definitely pulling any hot air from the case. I will definitely buy another one.

Pros: - High Air Flow - And Great air pressure

Cons: I purchased 3 of these for testing to see if they would make good replacements in our servers. Within less than 6 months 2 out of the 3 have completely failed and the third is about to go. Also, it's not just that they failed its how they did it. The 2 already dead fans barings became just stiff enough that the starting power required was high enough that it let out the magic smoke. *** Just to be very clear the fans spin freely and only have minimal drag and every other computer fan I have ever worked with in 15+ years in the industry would have been able to spin up with how little drag was on them. So no the drag should have not killed them. Now the third one is about at the same point. If just one had failed in this way we would have considered doing more testing but since all three are bad it is a sign of either a manufacturing flaw or simply a junk product.

Pros: The airflow on one of these things at max is amazing. Even on the quieter speeds, they can really move some air. The 3-pin makes it a great chassis fan.

Cons: They're incredibly loud when you put them on higher speeds, loud enough to wake up someone across the room. The body is about %50 deeper than most. They won't fit into certain parts of the case because of this.

Overall Review: If you have a computer with few fan ports, and really need airflow, then these will do the trick. I can't really emphasize enough how loud these are. I doubt they'll really ever need to be operating at even 50%+, but if you do need to put a hurricane in your case, these will do the trick.

Pros: Got this as a free item from buying Rosewill case. ~5000RPM, really powerful to exhaust the hot air under top load.

Cons: As others mentioned, the fan either turns on at full load or barely moves. HOWEVER, the trick go to your MOBO bios, setting the fan at around 47-49% PWM might make it run QUITE.

Pros: Moves a lot of air

Cons: Literally thought my case was getting ready for take off. The thing sounded like a jet engine

Overall Review: Make sure you get a fan controller for this thing. It is literally set for off or preparing for lift off. I swapped out the fan for another 120mm. Ill use this one in another case

Pros: Lots of airflow, for a relatively low price

Cons: These are loud! Very difficult to control these with your motherboard's fan headers. They are either barely turning or are full blast. I have ordered a fan controller so I can get better control over their RPMs. Update: After getting these fans on a controller. They still are not stable. Almost impossible to keep their RPMs under 3000 without them going into a pulsing mode. Also they are Loud! at 3000 RPM they were making 47 dBA. At full power they were making almost 60 dBA.

Overall Review: I installed 3 of these in my computer case. Trying to move more air when I Cryptomine with my GPUs. These move air, but unfortunately the motherboard doesn't give you very precise control over the voltage to these. The result was the fans at full blast would constantly spin up and then down over and over. Very annoying. Noise was also too much. It could be due to the ball bearing design, but for this price point there is nothing else that can move this much air. If you don't mind the the sound and just want to move a don of air, you will love them. But if you want more control over their sound and speed, forget it. I was hoping to have these running at low speed during the day when I work, and then high speed at night when I am mining Crypto. won't work for that purpose. I dropped 2 eggs due to the lack of control with the RPMs.

Pros: -Performs as advertised, probably under-rated in its specifications -Moves more air than you can possibly imagine

Cons: -You might need ear plugs, seems considerably loader than 45dB to me, I'd compare it to a large shop-vac -Will not run on 6 volts, so you will not be able to throttle this much, consider it either on or off -Do not plug it into a motherboard case fan header unless you want problems

Overall Review: The crazy reviews are not lying, this fan is everything people say it is. For $15 this is an absolutely absurd value for what it does. I mounted it in the bottom of my case, blowing up through the case and saw an across the board gain of about 5-10% in most benchmark tests just because of the volume of air it was moving through the case. Great to have on an on/off switch if you want to squeeze out those last few numbers in a benchmark. I'd imagine miners would love this as well, as it would be exceptionally great in a situation where noise is irrelevant and cooling is the only concern. For the money I don't think anything else out there will compete. I assume it was designed for cheap server racks, as I can't imagine any other real application for this besides novelty.