The Cooler Master MasterAir MA624 Stealth holds steady ground with some of the best large heatpipe air coolers we’ve tested, as well as performing just as comparably with some of high-performing 240mm AIOs.
Making use of that pair of large 140mm SickleFlow fans, the MA624 Stealth, slower fan speeds move a lot of air over the large set of twin heatpipe towers, similar to the Noctua NH-D15, Deep Cool Assassin III and be quiet! Dark Rock Pro 4.
By utilizing larger, slower-speed 140mm fans, Cooler Master’s MA624 Stealth reaches very low registered noise levels, nearly as silent as the Noctua NH-D15 and be quiet! Dark Rock Pro 4.
The remaining coolers using 120mm fans with much faster rotational speeds see higher decibel readings.
We see the larger heatpipe air coolers doing very well here due to their noise level advantage, while also remaining very competitive with the larger (but noisier) liquid coolers.
Priced right around $100 at time of writing, the Cooler Master MA624 Stealth is certainly expensive for an air cooler, but it’s in the same territory as our other high-end heatpipe coolers listed here. This is also the same pricing plateau we see many of our performance 240mm AIOs start at, but the AIO coolers then scale sharply upwards as we move into 360mm liquid coolers and more specialized offerings like the IceGiant ProSiphon Elite.
Thermal imaging with our FLIR ONE Pro shows nominal differences between 100% and 50% fan PWM for the Cooler Master MasterAir MA624 Stealth. We can see the heat soak difference between the front/fan side of the cooler (right side) in each photo, where the inlet fan feeds ambient chassis air into the heatsink towers and a gradual blaze of warmth as expelled heat exists the rear (left side) of the cooler in each image. Even so, the MasterAir MA624 Stealth dissipates heat evenly across the cooler at each fan speed setting.
Cooler Master has pulled out all the stops to release an excellent option in the large heatpipe cooler arena, trading blows with some of the best CPU coolers we’ve tested. While it doesn’t glitter with RGB lighting, it shines as an effective near-silent thermal solution for some of the most potent desktop CPUs from both Intel and AMD--as long as you don’t count Threadripper.