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CPU Cooler

NZXT Kraken X31 69.5 CFM Liquid CPU Cooler

(22 Ratings, 4.5 Average)

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Specifications

Manufacturer

NZXT

Model

Kraken X31

Part #

RL-KRX31-01

Manufacturer

NZXT

Fan RPM

800 - 2000 RPM

Noise Level

18 - 34 dB

CPU Socket

  • LGA1366
  • LGA1150
  • LGA1151
  • LGA1155
  • LGA1156
  • AM2
  • AM2+
  • AM3
  • AM3+
  • FM1
  • FM2
  • FM2+
  • AM4
  • LGA2011
  • LGA2011-3
  • LGA2066

Water Cooled

Yes - 120 mm

Fanless

No

Price History

    Reviews

    bmccarthy8989
    • 53 points
    • 49 months ago

    from completed build Skyline

    I gave this 3 stars for a few reasons. First I would like to say that this thing performs very well. Especially considering its price range and it being a single 120 x 120 mm radiator. However, it's pump is very loud. It is literally the only thing I can hear coming from the case. It has got a little better after running, (air not being circulated through the pump). The second thing would be that the pump top does not include the LED feature, which apparently only comes with the other Kraken models. Overall it is not a bad buy as it does perform well, but as I was going for a silent build, so it will not receive high marks from me. So if you don't care about noise it is a good purchase.

    aldorasha
    • 34 points
    • 50 months ago

    from completed build AMD Noctis [First Time]

    Quiet when idle, very effective when performance is needed. One of the first fully closed loop water coolers and the first with a variable cooler. The radiator is only 120mm yet it's one of the best coolers you can buy, anything better than this is slight overkill. It's price is very reasonable. The NZXT Kraken series has to be one of the best on the market.

    Vengeance1871
    • 34 points
    • 37 months ago

    After deciding on an i7 and given the small case, I wanted it to be as cool as possible, especially with the 1070 going in there as well. I used an AIO cooler in my previous build and it was amazing so i decided to try the same for this one. I really wanted to try and fit a 140mm AIO in this case, but everywhere I looked said it wouldn’t fit. Having gone through the build I can confirm that a 140mm radiator is just too much. This one barely fit as is. As you can see in the pictures, there is very little space on the bottom if the second RAM slot is filled. I was worried whether I could manage a push/pull configuration but there is enough space behind the front panel to mount an additional fan so I put the original fan that came with the case there. So far everything is working great. There aren’t any audible fan noise distortions from using two different fans and in general this is pretty quiet. It’s very rare that I ever hear these fans.

    mbrown64
    • 24 points
    • 42 months ago

    Its keeping the CPU cool enough (although I'm yet to push it really hard, so we'll see). The pump itself is quiet most of the time but does rattle occasionally. Replaced the fan with the Corsair AF120 White for looks. Probably mistake as its a tad noisy. CAM software is pretty but not amazingly functional.

    [EDIT: Put the stock fan back in. CAM software now able to regulate fan speed properly - much quieter. The Corsair was running at ~ 1500 rpm regardless of configuration in either CAM or BIOS Also bit of a noob mistake as the Corsair is AF not SP.]

    gnarlycharlie4u
    • 20 points
    • 51 months ago

    from completed build Get Better Gaming Rig

    Decent cooler. The variable speed pump and fan are a nice touch. I would not recommend for hotter products such as AMD FX9590. It will not sufficiently cool my R9 290x, even at stock clocks the GPU reached temps in excess of 93C after less than an hour of gaming.

    ArtStream21
    • 19 points
    • 32 months ago

    from completed build Little Black ITX Box

    NZXT 120mm Kraken x31 liquid CPU cooler. Good reviews. Used in similar Parts Picker builds. I've been stress testing the CPU and I can't hear the pump.

    senseirulez
    • 15 points
    • 38 months ago

    I was thinking of buying CM EVO 212 but with some research I learned that air cooler might not be enough for k series CPUs sometimes.Corsair product reviews was terrible and with my NZXT case I thought it would be good combination.It does its job,my cpu's idle temp is 25C and never goes above 55C at load.NZXT provides great control over your system and cpu cooler via CAM software so you can customize its rpm's and performance.

    SwankyTunez
    • 13 points
    • 46 months ago

    Freezaaa!

    danimsmba
    • 10 points
    • 45 months ago

    from completed build Gemini SAGA

    This bad boy is possibly the best bang-for-buck AIO. It was a breeze to install and works like a charm. keeps the cpu cooled. The CAM software from NZXT makes a really good product even better.

    ad6m_l4w
    • 10 points
    • 36 months ago

    from completed build 1440p Gaming Build

    I probably could have got the same performance out of an air cooler for less money but I think AIO coolers look cool, really quiet and holds a stable 40GHz clock, but like I said could have saved money by getting an air cooler.

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