Cooler Master SickleFlow 120 - Sleeve Bearing 120mm Green LED Silent Fan for Computer Cases, CPU Coolers, and Radiators

Was looking for a couple 120mm fans that were PWM controllable. These things are, so I bit. Thankfully they fit great on my Cooler Master Hyper 212+ CPU cooler. With the stock cooler on my dual core AMD Phenom II (unlocked to quad core) my CPU used to run upwards of 80 celcius under load and wanted to climb higher before I would have to abort the testing. I have a cheap and badly designed case that allows little to no airflow, and wasn't about to lock it back to a dual or triple core. Not wanting to admit defeat just yet, I added the 212+ and ONE of these fans (though I bought two). I was now safely under the 65* rated max temp by 5 degrees or more at all times! It now sat at 55*-60* under full load and idled somewhere in the low 30's. I was ecstatic. I added the other one to the front of my case to pull air in, and an old worn out 80mm fan that I had laying around in the back to help exhaust some of the air. It instantly got even better results. In probably the worst case you could ever cram a PC in, I managed to get it down to a rock solid 30 degrees during most usage, and it never gets above 50 degrees under full load now. To say I am IMPRESSED is an understatement. It also stays completely quiet the whole time. The only time I've ever noticed them is during stress testing itself. Buy these, you won't be dissappointed. They have now been running in my PC for close to a year non-stop, with no issues.

Great budget fan. The green is vibrant and looks great. A huge plus was that a molex adapter was provided, and for the price that was a nice surprise. I ordered a couple corsairs that cost twice as much and didn't even come with any. All my fan pins on the mobo were being used, so it was awesome being able to plug this into my psu without needing to also purchase an adapter. Of course, it has to run full speed not being hooked up to a controller, so it is a bit loud, probably as loud as my other 3 fans combined. But for the price, and if you run it at a lower voltage, you'd probably be happy. I can't complain though, as it was 7 bucks. And I love the LED vibrance. Mounted it to the front of my corsair case under the red fan that was preinstalled on it. A nice festive 2 tone appearance for the holiday season.

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

This is a fantastic fan. Its whisper quiet and moves a good amount of air. If you have PWM headers on your motherboard, then you can easily setup the fan in your BIOS. I am using 4 of these in my PC. I am using an ASRock Z77 Extreme4, which has two PWM headers. One is marked CPU1 on the top of the board, and the other is CHA_1 on the bottom of the board. I have two of these fans installed on a Noctua NH-D14 and connected to the CPU1 header. This setup seems to work just a little bit better than the fans provided by Noctua since they can adjust their speed with the CPU load. At full load on Prime95 and IBT I am seeing my i7-3770k run about 4c cooler.The other two fans are mounted on the top of my case (Corsair Vengeance C70) and connected to the CHA_1 header. These fans barely make a peep and they don't generally spin up to much, even under full CPU load. That is perfect for me. Also, since they are on the top of the case, they are mounted horizontally, which doesn't seem to work out to well for some fans. These fans do not seem to mind at all. They make no unusual noises when mounted horizontally.Overall, I am very satisfied with these fans and I will buy more for future builds.