Corsair CO-9050043-WW ML Series ML120 Pro LED 120 mm Low Noise High Pressure Premium Magnetic Levitation LED Fan - Black/Blue

ML120 PRO and ML140 PROVery high quality fans. I have bought about 15 of these now. Their main strength is the exceptional range of speeds they will run at. The 120mm runs 400-2400 RPM. The 140mm runs 400-2000 RPM. They generate very high pressure levels so are perfect for coolers and radiators but can also be used as case fans. The fans are solid and heavy. They inspire confidence with the obvious quality of build. They are supplied with four black screws.These are very quiet fans. However, they can turn at very high RPM so the “woosh of air” can be significant. They are pretty much silent up to about 1100-1200 RPM, but beyond that you can hear the air moving. At 2000-2400 RPM the amount of air moving is loud. Most people will not want that level of RPM. What I do is control them up to around 1000/1200 RPM for normal cooling then ramp them up to higher levels for emergency cooling only. There is no bearing noise at all. No clicking. Nothing. Just air!At 50% these are developing twice the pressure that a Scythe Mugen cooler fan does at full speed. Comparing to Noctua, they have a very similar performance in both noise and pressure, but offer higher RPM so more flexibility. Don't listen to the nay-sayers who are just running them flat out and expecting them to be silent. Having said that, you do need to take control of the fans to ensure you get the right cooling to noise balance. Most BIOS' these days allow you to control the speed or applications like iCEU.Because of the high RPM and high pressure these are better suited to use as a replacement fan on a heatsink or AIO. In fact these are the fans provided as standard on Corsair top of the range water coolers. I use them for everything, including case fans ( These are four pin fans not three pin so you need to check your headers. ).Please note that the Dual Pack of fans are the standard ML fans not the ML PRO.They are a bit expensive, yes, but they are very good.

There's no getting around it, these are very expensive fans. Kitting your rig with 4 of these to replace stock fans is a cool 100£.. good luck explaining that to your wife.But as long as you manage your expectations, then i think these could be worth it.1) Looks: I think they look great. PWM means they'll constantly be supplied with 12V so they'll keep their brightness even when you lower their rpm. Some led fans are 3 pins and would dim when you do so. The construction is also pretty sturdy.2) Cooling and noise: If you already had good quality fans (in the say 11£-15£ range), then you won't really notice decreases in temps. What they do have however is a pretty large rpm range, so you can lower them to inaudible levels, and crank them up all the way to 1800 rpm if you need to. That flexibility is pretty neat. Some fans would also rattle at low rpms, but these so far remain silent.Overall if you had crap and noisy fans then these would be a very worthwhile upgrade. If you already own good fans then it's a more difficult choice as these aren't cheap, and you'll have to decide whether the looks and build quality is worth it.

Great good quality product as you can expect from Corsair.I have used their older generation fans when specifying my gaming PC last year with the two different variants the static pressure and airflow types. This is done away with in this design and it is effectively an all in one fan combining the air flow and static pressure into one product with all different colours etc.One thing to keep in mind when considering this product is that it needs a 4 pin fan output on your motherboard or fan controller not the usual 3 pin this is because there is a consistent 12 volts fed to the fan and the motherboard/fan controller tells it how fast to spin. The advantage of this is if you get an LED version the LED's do not dim/brighten as the speed decreases/increases.The magnetic levitation technology means there are no traditional ball bearings in this fan so reduces drag and noise which helps in two ways.1) The fan has a higher RPM than regular fans which means better cooling (very helpful in summer).2) Less noise which if you have up to 7 of these in your case it will make a big difference to the sound your gaming rig generates as 7 fans producing 40dB each does not mean that your system makes 40dB its more nearer 50dB.Overall if I was building a new gaming rig these are the fans I would use and with a 5 year guarantee you cannot go wrong! Also a recommendation get a fan controller so you can extract the full potential and make sure it has a 4 pin output for all fans.

Unfortunately, my experience, the 2 Corsair CO-9050046-WW ML Series ML140 Pro LED White 140 both units i had gave a low to medium level High pitch increasing buzz/ whine from 600~1350rpm not loud, but you do or can hear it all the timeIf you're in a moderately loud room or if your PC is on the floor under a Desk a meter or more, you will hear nothing, so all is good - but in a quiet room once you hear thar whine it's there all the time you notice it all the timeBuild quality is good and the airflow is high and yes, it's a high-pressure flow very easy to installat 1500rpm and above the high-pressure airflow can be heard across the room it does ger a bit noisy (but preferable to the high pitch whine and yes, the high air flow at 1500rpm+ does mask over the whine buzz completely