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Noctua 140mm/150mm Case Fan Roundup Review

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Conclusion:

I'm a big fan of Noctua fans, so I'll try not to be too biased in my conclusion and let the test results speak for themselves. There are so many variations of air coolers and watercooling radiators that each type of radiator will work best with certain types of fans, so these test results aren't definitive of what these fans could be fully capable of. I just happened to have two types of radiators that fit 140mm fans, so I went with what I had. I will be keeping these babies around to test on other radiators against other 140mm fans in the future, so their performance may be measured more accurately.

One of my favorite things about Noctua is how quiet its fans are without sacrificing thermal performance. Noctua pushes the boundaries of continually making improvements in all aspects of its products, and the latest from Noctua doesn't disappoint.

Comparing these fans to their predecessor, the Noctua NF-P14, it's easy to notice the differences in design, and I could definitely hear less vortex noise!

The Noctua NF-A15 PWM was the better performer of the three, but its size and hole spacing makes it tough to find the right place for it. While it's not really supposed to be used on watercooling radiators or to replace 140mm fans for air coolers, it actually cooled better than all the other 140mm fans used in this review except for the Noctua NF-P14 in the air cooling test. While that's a definite plus, and also being slightly quieter than the NF-A14 FLX, it won't fit on the popular Cooler Master Hyper 212+. It's limited to mostly air coolers with wire fan adapters to attach fans to the air radiator, like the higher end Noctua NH-D14 or any of the TC14 Phanteks coolers. It also won't fit very well as a rear case fan for certain cases, though it will fit on the front and top without much trouble.

The Noctua NF-A14 FLX performed much the same as the NF-P14, but at a quieter level. I really wish there were two of these I could put in push/pull against two NF-P14's in push/pull on a 140mm watercooling radiator. The square design would theoretically make it more optimal, but I'll have to purchase a second fan in order to test out my theory at a later time.

The Noctua NF-A14 ULN is pretty much what I would call the "lite" version of the NF-A14 FLX. By itself, it had trouble pushing enough air through a watercooling radiator to do much good. However, I could barely tell that it was on with how quiet it was! While I wouldn't recommend this to cool a 140mm radiator by itself, I could see a couple of them on a larger 320mm or 460mm radiator where silence was the intended result. It's the only Noctua fan that actually sacrifices thermal performance for near-silent operation. While it may be a con to some, it may also be a pro for others.

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