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  • NZXT Technologies KRAKEN X40 Premium 140MM Ultra Performance Liquid CPU Cooler RL-KRX40-01 Black
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NZXT Technologies KRAKEN X40 Premium 140MM Ultra Performance Liquid CPU Cooler RL-KRX40-01 Black

85 customer reviews
| 6 answered questions

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  • World's first all-in-one 140mm cooler with capacity to mount up to two 140mm fans/High performance pump and copper block with interactive digital fan control
  • Large tower support with extended 16" tubing and premium black sleeved cables for a clean look and improved airflow
  • Integrated HUE controlled LED pump cap/Completed sealed system backed by a 2 year warranty
  • Compatible List: Intel Socket 1155, 1156, 1366, 2011 Core i7, Core i5, Core i3/AMD Socket AM2, AM2+, AM3, AM3+, FM1
  • Water Block: Material Copper/Motor Speed 2900 + 150 RPM/Voltage 12V
  • Pump: Current 175 mA/n Control Interactive Digital Fan Control/LED Color Hue Controlled Color Changing Lights
  • Fan: Dimension 140 x 140 x 25 mm/Bearing Liquid State Bearing/Speed 800 - 2000 RPM + 10%/Noise 21 - 37dBA/Air Flow 54 - 98.3 CFM Connector 4 Pin PWM
  • Radiator: Dimension 138.4 x 27.0 x 172.5mm/Material Aluminum/Tube Length 400 mm/Tube Material Rubber

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Product Description

NZXT introduces the Kraken series, the first premium all-in-one water coolers for PC enthusiasts. The Kraken X40 is a high-end 140mm water cooling solution where ease of use meets functionality. Included is one NZXT FX-140 PWM fan, with capacity to install an additional in a push-pull configuration for unrivaled cooling performance. At the core of the cooler is a state-of-the-art pump attached to an all copper base. Bridging the radiator and pump are extra-long 16” tubing and premium sleeved cables, allowing Kraken X40 to be easily installed into even the largest chassis. We developed the Kraken series to be the best closed loop water cojolers on the market. Our customers should not settle for anything less.

Product Details

  • Product Dimensions: 5.5 x 6.8 x 1.1 inches ; 1.9 pounds
  • Shipping Weight: 3.2 pounds
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B00ANJRTYS
  • Item model number: RL-KRX40-01
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (85 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: December 7, 2012

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

13 of 14 people found the following review helpful By William H Crisp on March 7, 2013
Style Name: 280 MM Verified Purchase
I am using the Kraken X60 with an i5 2500k, and a Cooler Master HAF XM case. Installation was a snap, I found the instructions to be perfectly simply (despite some reviews stating otherwise). If you are at all mechanically inclined, and built your own computer in the first place, then I can't see this being an issue. It has the thermal paste pre-applied even, like most EZ-mode coolers. Anyone who complains about this installation had best steer clear of actual water cooling loops, because you just aren't going to get it.

I had plenty of clearance with an Asus Sabertooth P67 motherboard to install the 2 140mm fans inside the case, on top as exhaust. I installed the radiator on top of the case and underneath the shroud. There appears to be enough room to install another pair of fans on top for a push/pull with this case, but I don't believe lack of airflow to be a bottleneck. In fact, the temp differences between the aptly named "Silent Mode" and the deafening "Extreme Mode" are only 1-2 degrees. That would be a bad thing except, the temperatures achieved in Silent Mode in the first place are quite low.

The software is ok. Without a 3-pin CPU header on my mobo, I had to plug the Kraken into a case fan header instead. It does provide logging and control of the full sRGB lighting on the waterblock/pump assembly.

All in all, I am extremely pleased. With the 2500k at 5.0 ghz and 1.45V, my idle temps (across the 4 cores) are 25-32deg C -- quite standard -- and load temps under Prime95 are ~63 on the hottest core. After some benches, I took it down to 4.8 @ 1.42V. Idle temps are the same, naturally, and load temps are ~59. So, about 20deg cooler than the Hyper 212 Evo I had installed previously.

It's still not a "real" watercooling loop, but I have to say: they are getting damn close.
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7 of 7 people found the following review helpful By Gregory K Cable II on March 10, 2014
Style Name: 280 MM Verified Purchase
I am running this product with a Intel i7-4770k Haswell Socket 1150 CPU, a notoriously hot chip, overclocked from stock 3.5 to 4.2 ghz. The NZXT Kraken X60 does a great job at cooling, my CPU runs in the 30's Celsius at all times, including under heavy load. The fan control software does an excellent job of throttling the fan speed to maintain minimal noise necessary to maintain high performance cooling.

That said: ALL of this is true ONLY because I did my research and new what I was doing before I purchased and tried to install this product, because the included instruction are confusing and inadequate at best, and potentially damaging to both the unit and the hardware it's being installed with at worst.

Here are some important installation pointers for anyone considering the Kraken X60:

1) The instruction say "Install Software Then Hardware." This is misleading, and confusing to some builders who wonder if that means they need to install a different cooler in order to run the system while installing the Software. What you actually need to is install the entire system with the exception of the USB header, then install the software, then install the USB header. If you do that you will be fine. If, however, you install the USB before installing the Software, Windows will attempt to install the USB device without the drivers and the control software will not function properly once installed which is why several users have had problem with the LEDs and fan control software not working which is a pain because without the fan control software the fans run at full speed full time which sounds like blow dryer on high. This is explained in depth during NZXT's installation video on YouTube, but not at all in the instructions.
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3 of 3 people found the following review helpful By Michael Middleton on March 18, 2014
Style Name: 140 MM Verified Purchase
I have previously used the Corsair H100i liquid CPU-cooler (as seems to be the norm around here) on my i7 2600k. It worked very well and kept my CPU extremely cool, even at overclocked speeds of 4.4GHz. When I purchased the Kraken x40, I was skeptical that it would be able to keep pace but I sure was wrong. I put this guy in a little micro-ATX build I have with an i5-3570k and the Kraken works wonders. The CPU idles around 29C and it never rises above mid-30s.

I don't usually like to bring up other products in my reviews because I prefer to let the product speak for itself, but having used both of the 2 big brand closed-loop CPU coolers, I think it's appropriate to do so this time, since most readers are probably deciding between Corsair and Kraken coolers.

So, how does it stack up against the H100i? Well the H100i has 2x120mm fans on top of the radiator and the x40 only has a single 140mm fan. The smaller surface area means that under full load it won't keep things quite as cool as the H100i, but that is just the nature of the game. Less surface area = less cool. As for the fans themselves, I would say NZXT fans and Corsair fans are both pretty good quality. You won't see the full benefits, say if you had Noctua fans instead, but these ones get the job done very well and I can't see a need to replace them if you don't want to.

Even if you plan on overclocking you CPU as high as 4.6 or 4.8GHz, the Kraken is more than enough to keep it in normal temps. That being said, If you are an avid cooling enthusiast who wants the coolest possible rig at all times, the Kraken x40 might not get you there; you would need a CPU cooler with 2 fans.
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