By contrast in Performance mode the coolers were intolerably noisy, even with the glass side panel installed on the be quiet! Dark Base 900 case and it has to be made clear the be quiet! case lives up to its name and is very quiet. This highlights the point we make in the video which is that it is all well and good to improve the technology used in the bearings in a fan but when you crank up the speed and start shifting air it is going to get noisy. Normally case fans aren’t too exciting, but they’re a critical piece of any PC build — and these ones are actually pretty cool. Corsair’s new ML120 and ML140 fans use magnetic levitation instead of ball bearings, providing zero friction. That should make them quieter than fans running at the same speed (or equally, at higher speeds when producing an equal amount of noise). That sounds promising, so let’s see if Corsair’s new fans deliver on their promises.

options: PROFIBUS DP, CANopen®, DeviceNet™, PROFINET, EtherCAT®, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK, FLOW-BUS Corsair ML fans do not change the world, however they are an interesting move. The new magnetic levitation bearings are an irrelevance to us, although they make a neat hook for marketing purposes. In the case of the ML fans the changes go far beyond the location of the LEDs as the frame uses a different construction that feels considerably more sturdy and rigid than previous fans, the motor support is a different shape and there is a pronounced radius where the air flow leads towards the rotor tips. ML is a hybrid fan that can replace either the AF (Air Flow) type of thin bladed case fan or the SP (Static Pressure) type with wide blades that is typically mounted on a radiator. Once plugged in, it’s time to actually install the fans. Despite moving from 120mm to 140mm, the fans still fit easily next to our existing components. We placed the bottom fan first, screwed it in, then the next one flush on top of it and screwed that in too. Thanks to NZXT for providing the Manta case and Kraken X61 liquid cooler. Thanks to Samsung for providing the Evo 850 M.2 boot drive. Thanks to Zoostorm and Crucial for providing the DDR4 RAM.The cable is mounted to one side, and measures around half a metre in length. This terminates in a 4-pin connector: 3 pins for power, 1 pin for reporting and controlling RPM. We could drone on about temperatures all day long however it makes life easier if we cut to the chase with a summary. Ambient temperatures during testing were stable at 25-27 degrees so we’ll talk absolute figures rather than Delta. Corsair’s new ML120 and ML140 fans deliver quieter operation and better performance than most fans on the market. The new magnetic levitation technology seems to be working wonders, and it’s well supported by noise-damping corners and fun LEDs in the Pro and Pro LED models. Replacing every fan in your case might be an expensive venture, but these premium fans are worth it. Corsair is excited about ML as it allows the fans to spin much faster than normal. Where we typically expect a 120mm/140mm fan to max out at 1,400rpm-1,600rpm, in the case of ML120 the range is 400rpm-2,400rpm and for ML140 the figures are 400rpm-2,000rpm. Corsair was adamant that we should test ML using Intel LGA2011-3 as the mainstream LGA115x is less efficient and responds less well to changes in cooling. We entirely agree with this assessment and if you are serious about cooling and are not yet using LGA2011-3 consider that you are pretty much wasting your time.

Next, we investigated the power situation. The fan controller card only sports 3 pin connectors and our motherboard fan connectors are occupied, so we’ll use four pin connectors connected directly to the power supply instead. With the larger Kraken X61 cooler the NZXT FX140 fans operate at 900rpm and 1,600rpm while the ML140s run at 600rpm and 1,400rpm. We used the Decibel 10th app and an iPhone 6 Plus to measure the noise levels of the test rig before and after the new fans were installed, at idle and under load. Measurements were made six inches from front of the PC, where the fans were installed. Corsair has employed some nifty technology in its new range of ML fans however we have to be careful with the name. The bearings that support the rotors on the motors use Magnetic Levitation but this is not shortened to Maglev (like the famous trains) as that is a trademarked term so we either have to say Magnetic Levitation or take the easy route and call them ML.Our test rig is MANTAMACHINE, a mini-ITX system built into the roomy NZXT Manta case. The case’s front intake can accommodate 120 or 140mm fans, but only 120mm fans are provided… so let’s upgrade them with these new Corsair fans. Quiet mode costs you less than 5 degrees, regardless of the cooler or fans, so the extra noise of Performance mode makes it pointless. With the fans installed, it was time to turn on the PC and see what differences in noise and performance we could find! Instrument to be rigidly bolted to a stiff and heavy mass or construction for guaranteed zero stability. In Quiet mode all of the fans we used were near silent. In Performance mode they were all unacceptable. Closing thoughts