Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Will these fit on a 212 Evo heat sink?
Document: Overall, I'm very happy with these fans. I might even pick up another set to replace the fans on my Hyper 212 Evo, but I'll probably just upgrade the cooler instead.
Works true to specifications and reviews,This indeed runs quite loud compared to the quiet editions.But definitely pushes a good amount of air through my heat sink.Twins pack is definitely worth it!
They would also be a great fan for a heat sink. Corsair Air series offers many different versions such as the AF vs the SP, both serve different purposes. The AF's would be suited for case fan duty.
I ordered these to use on my heatsink (Hyper 212+) to keep my I7 extreme a bit cooler, and it worked great! I have it overclocked to 4.4 GHZ, and it is staying under 40 C while under heavy loads. I burned up 2 liquid coolers in 6 months, and went back to the old school cooling, and could not be happier. Great fans that run up to 2300 RPM, and really move heat out of your case.
I used to have a blademaster and the stock (I think blademaster as well) coolermaster fans on my 212 Evo Heatsink in a push pull configuration (pushing out the back). I decided to upgrade to these because I was getting weird RPM results when using the blademaster I had bought (it would occasionally dip way below 600RPM, down to 550 or sometimes even 400)After getting this, I get about 700-750 RPM easily at idle. My case has seven fans, including these, two fractal 140's on top, two corsair AF140s in front, and I moved the blademaster to the back fan (now working fine for some reason?)
just installed them. so  far so good. not a lot of noise. like the way u can  change the  rings to fit the color of your case.
These are great fans for use on radiators and heat-sinks, and an incredible deal in the 2-pack. Given the PWM control, there's not much reason not to buy the high performance version anymore, since you can have them spin down to much lower RPM when you don't need the cooling or want a quieter experience.Like the older Corsair fans these come with three (red, white, blue) easily swappable color frames to help them match the aesthetics of your build, a small and simple addition, but very welcome.There's really not much else to say, great fans!
I ran a PWM fan splitter cable to my motherboard, and they run at a 80% load until my CPU temps get a few degrees above idle. this way they pull a fantastic amount of air through the restrictive filter and to my eyes are a almost silent soft fan sound. Really truly impressed at the performance these provide compared to their acoustic signature, and the best part is they only cost a few dollars more than the cooler master fans are better in every way. my only concern is the tight fit on the rubber mounts, but my trick was to use some skin lotion and a q-tip to lubricate the mounts during installation, even though they can be a little finicky, once they are in the do an incredible job of dampening vibrations and holding the fans in place.
I bought this pair fans because one of my Corsair's H100i fans started to fail and it was whirring horrible, so I had to replace it.I have to admit I made a mistake and bought the AF120 Performance Edition Twin Pack for the CPU cooler because I tought &#34;these fans moves a lot more air and airfow is great! and it does! But this type of fans are used to move air from inside your case to the outside, it wasn't meant to be used to pull air to a cooler's radiator because it lacks the power and static pressure, it doesn't have the required pins to be controlled (the cooler needs 4 pins to control the speed according to the cooler's controller) and also, the shape of these fans don't fit perfectly to the radiator and if you install them (like I did) there's a lot of air leakage ... ughhh!
title says it all. they are powerful and quiet. i replaced the fans on my h80i liquid processor cooling unit with these and my processor runs cooler and there is considerably less noise. i have another 2 on my case hooked up to the 4 pin header on my bored so they vary in speed as needed.if you are looking for a reliable, powerful, quiet fan with a 4 pin, look no further
Answer: Yes, they fit real nice, and I installed 2 on my 212 Evo in a push pull set up to exhaust towards the rear fans. I knew these would be better fans to cool the monster underneath it!