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CPU Cooler

NZXT Kraken X31 69.5 CFM Liquid CPU Cooler

( 4.5 Average / 20 Ratings )





Kraken X31

Part #


Supported Sockets

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

Liquid Cooled


Radiator Size


Noise Level

18.0 - 34.0 dbA


800 - 2000 RPM

Completed Builds Using This Part

See All Completed Builds


Merchant Base Promo Shipping Tax Availability Total
OutletPC $68.89 $68.89+
SuperBiiz $68.99 +FREE s/h $68.99
Amazon $79.90 Free two-day shipping with Amazon Prime In stock $79.90
( 3 new from $79.90, 1 used from $64.14. Last updated 38 minutes ago. )
NZXT $79.99 +FREE s/h Out of stock $79.99
* Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

Price History (Excluding Tax & Combo Deals) History:


markov52 9 points 21 months ago
from completed build Parallel Computing

I had a little bit of trouble fitting this into the 'Aerocool StrikeX-GT' case. But it was all well worth it. It runs very quietly, and keeps the cpu temperature around 60 C when under heavy load.

gnarlycharlie4u 21 points 19 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.

aldorasha 34 points 19 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.

bmccarthy8989 53 points 18 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.

SwankyTunez 12 points 14 months ago


dOnuT_NOA 9 points 14 months ago
from completed build The Refrigerator

Easy install but instructions are a lot better on the website.

danimsmba 10 points 13 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.

mbrown64 23 points 10 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.]

senseirulez 13 points 6 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.

mc41 20 points 6 months ago
from completed build Sky's the Limit

Not a Kraken x31 in my computer. I put the Kraken x41 in my build because I thought it was compatible with all NZXT cases, when I ordered . I t wasn't till it arrived that I found out it wouldn't work I put the x41 in anyway cause I like the way it lights up and the x 31 doesn't. PCPartpicker won't let me list the x41 cause it's not compatible with the S340 case.