Cooler Master R4-BMBS-20PK-R0 Blade Master 120 - Sleeve Bearing 120mm PWM Cooling Fan for Computer Cases, CPU Coolers, and Radiators, Air Balance, 120mm - Non-LED

I've got this one for cooling down my low profile Scythe Shuriken CPU heatsink.The heatsink comes with a 100mm fan which is only 10mm deep, which is nice and does the job. But TBH, 10mm is not enough to push sufficient air to allow the heatsink to perform at it's best.So, I checked the gap between the original 100mm fan and it's surroundings and found that this heatsink could accomodate 92mm fans with it's supplied brackets and gave it a go.Perfect fit! and being a BladeMaster, I had no doubts or regrets. I have purchased this line of fans before and none of them failed. In my opinion, the BladeMaster series has one the best noise-cfm-rpm balance out there, with a sturdy, solid construction and plenty of accessories included for any configuration.Keep in mind this one is the PWM version!, so it comes with 4 pin connector and is intended for CPU heatsink replacement fan (mostly). If you just need a simple 92mm case fan, check the 3 pin model.Highly recommended.

Added couple of these during my build, no issues.Built my entire computer through Amazon for less than it cost me to buy my Macbook Pro. This is the motherboard I decided on since it had two Ethernet connections that I could dedicate to CNC machines to avoid any crosstalk. By the time I write this I'm sure that they probably have come out with a better board, but what can you do , have to get on the marry-go-round sooner or later. My Case I chose is the Chenbro Rackmount 4U Server Chassis that accepts this board without any issues.Intel i74790 processor, NZXT aperture card reader, Corsair Vengeance 32 GB DDR3 RAM,Samsung slim internal disk drive, Corsair CXM 750 Watt power supply, Samsung 850 pro 512 GB SSD ,TP Link n900 wireless dual band pic express card, NZXT Sentry 3 touch screen fan controller with extra fans. And a killer 4 monitor graphics card that I can't remember what it was now. Couldn't be happier with my setup, Being I haven't built a computer since the mid 90's it was really cool to see this come together without any issues at all, Definitely the way to go if you want a clean computer without any BS software preinstalled from the factory.

Pros:+One of the best performing Static Pressure fans in the 120mm fan size, and especially at this price+Nice bright green LED's+Great fan blade design permits low RPM with very good performance allowing for quieter use+Low priceCons:-Made in China-Sleeve bearing, which does not have the life expectancy of more expensive fans**Stats:=Model R4-L2R-20AG-RW=UPC: 884102007965=EAN: 4719512019108=120mm x 120mm x 25mm=3-pin DC-fan (vs 4-pin PWM), therefore LED brightness adjusts with the voltage provided (lower voltage = slower fan speed = dimmer LEDs)=50,000 hour MTBF Sleeve Bearing (ball bearing is better)=Max speed: 2,000 RPM=Max airflow: 69.69 CFM or 118.3 m^3/h=Max air pressure: 2.94 mm of H2O=Max noise: 19 dBA=Max power draw: 4.2W (0.35A)This fan is designed to best function where there are objects within 3", such as a radiator grill, heatsink or hard drive cage(s). It will not throw air far into a larger case. It will however force air into small crevices (or pull through them) with a much greater success than fans with fewer blades and/or large gaps in the blade design.Two of these are cooling my processor mounted on a Corsair H100i GTX Extreme radiator (240mm long). I only have to keep them at 1080RPM @ 5.6V for excellent thermal performanceIf you want a fan for pushing air through a case, then an Air Flow Fan design would benefit you. Those have higher CFM (cubic feet per minute) values than this fan

I decided to get this fan to implement the dual fan configuration of the Hyper 212 from cooler master and it was a great fit. The fan is very quiet, however I had to change the BIOS configuration for CPU Fan notifications. I was getting constant warnings of sub 600RPM performance and it is because this fans normal speed is slightly below that threshold. This does not mean that the fan is not cooling the CPU efficiently, to the contrary there is plenty of airflow with the fan but the sub 600RPM keep it whisper quiet. I did push it to max capacity to test the sound level and it is much lower than my old ThermalTake fans on my case, the PSU fan has a higher noise than the two Cooler Masters on full speed. if you have some noise on your background (tv, game) you wont notice. I found the best compromise for performance and noise to be the default medium speed which allows a stable OC 4.9HGZ of a 3770K with a max load temperature (load tested with Prime) of 79C.

I had read some details about Noctua fans (my first choice) having problems being recognized by the Acer, and this fan was recommended as working well. Indeed it does, plugs in and is recognized and controlled by the machine/bios. Certainly in an unmodified Acer, the extra fan isn't needed, but I built this as a gaming machine for my grandson. Added a 550w Seasonic gold power supply, upgraded to 16 gig memory, installed a WD Blue 500 nvme drive and used the included 1tb (Toshiba) to install games. The best part was how well a Gigabyte 1660 ti card works in the machine. I would have gotten the Acer with the i5, but the four core i3 was on sale for under $200, and just a year ago 4 cores meant i5. Very usable "stealth" gaming rig, very quiet, and very playable. This fan works great and really helps when pushing it full throttle.