NZXT Kraken X62 All-in-One CPU Liquid Cooler Review

With today's NZXT Kraken review we step up the performance ladder and review its X62 model AIO CPU Cooler. As NZXT spells out on it website, and it is not modest about it, saying that the new Kraken series "have been redesigned to bring you the greatest experience in liquid cooling, all backed by an industry-leading 6-year warranty."


Results: Temperatures

For our stock testing our retail purchased Intel Core i7-4770K will be kept at 3.50 GHz with a minimal 1.00v. For overclocked CPU testing, we will be running our Intel CPU at 4.4GHz with 1.25v. Idle temperatures will be recorded after a twenty-minute period of inactivity. Any fluctuation during the last sixty seconds will reset the timer for an additional five minutes. Load temperatures will be recorded after a twenty-minute period for air cooled systems, and 30 minutes for liquid cooled systems, at 100% load. To obtain this load we will be using AIDA64 Extreme Edition v3.00.2500. Any fluctuation during the last sixty seconds will reset the timer for an additional five minutes.

Please note we start our charts at 25C which is the ambient temperature at the time of testing. Since we are not testing an active cooling system such as a chiller or Peltier cooler, it is impossible for the temps to be less than ambient. This is why we start our charts at 25C.

Stock CPU Clocks

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Let’s be upfront here. The Kraken X62 does great job at stock speeds but why on Earth would you use a cooler like this at stock speeds? The short answer is you probably wouldn’t. The long answer is that if you use this AIO on something with more cores like 6950x then you know it’s going to do a great job no matter what. Or maybe you need to run the system in a "silent" mode. Either way, the Kraken X62 can cool the CPU down at stock speeds with ease whether you run it at full speed or low.

4.4GHz Overclocked CPU

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Now this is where we separate the real contenders from the wannabes. At the lowest speeds the Kraken X62 performs extremely well which is always encouraging but it’s when you crank everything up that the fun starts. Running at full speed the Kraken X62 is able to cool down our CPU better than any cooler we ever tested. The different is minimal but very measurable, greater than 1 degree, and still a fact that the Kraken X62 "wins." This, better than anything else, highlights NZXT’s commitment to enthusiast level cooling in the AIO Kraken series.

Sound Profile and Loudness

To test the sound output of the fan we first start by disabling all other fans in the PC. The decibel meter is located four feet away from the test system, and then we collect the dB data in the systems various configurations.

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Running the fans at full speed produces quite a bit of noise. Simply put, these fans are loud. The noise is a lower pitch which helps a bit but not much. In this configuration, I can’t think of many uses outside of gaming and even then, I would suggest using headphones instead of speakers.

Turning the fans down to minimum makes nearly all the noise simple vanish. At low fans speeds, the Kraken X62 is a "silent" cooler that still keeps our overclocked and overvolted CPU in check and fully stable with a 100% load. Performance is sacrificed but not as much as you might think which makes this a viable solution should you need it.

It may not be a huge concern on enthusiast’s minds but the fact that can you can have such strong cooling without all the noise is a huge feat of engineering on the part of NZXT. This should go a long way to broaden the appeal of the Kraken X62. And given that you can easily spin the fans up while using the system fully loaded makes it a lot easier to accept.