Remember the time when liquid cooling a computer chip was considered to be an extreme approach, one performed by hardcore enthusiasts and overclockers alone? Everything had to be personally designed and or procured by the user, as there were no specialized commercial products available at the time. Radiators were modified heater cores extracted from cars, CPU blocks were rare and occasionally machined at local workshops using a copper block and a lathe, while high-performance tubing came from shops with medical supplies.

As demand grew, aided by the ever-increasing noise of small CPU heatsinks, companies specializing on liquid cooling solutions began turning up -- a little too fast perhaps, as tens of companies were founded within a few months' time and very few of them actually survived for more than a couple of years. Enthusiasts could then buy specialized liquid cooling equipment and even whole kits from just one seller and only had to assemble the setup into their system. That of course is no simple process for an amateur and a nightmare for a system builder, who cannot ship a system with a topped off water cooling tank or assume that the user has the skills required to maintain such a system, therefore the potential market remained limited to advanced users only.

This all changed in 2012, when Asetek came up with an inexpensive closed loop solution, a liquid cooling device that was leak-free and required no maintenance at all. The radiators of the first few solutions were small and their overall performance hardly better than that of air coolers; however, aided by the modernization of computer cases, the mounting of larger, thicker radiators inside a PC soon was not a problem. In many cases the kits were now no harder to install than any CPU cooler and required no maintenance at all, opening the market to virtually every computer user seeking a performance cooling solution. This spurred massive interest amongst OEMs and manufacturers, who all strive for a slice of the pie.

There have been tens of AIO (All-in-One) closed loop liquid coolers released just in 2013; today, we are having a roundup with 14 of them, coming from five different manufacturers, alphabetically listed in the table below.

Product Radiator Effective Surface Radiator Thickness # of Fans (Supplied / Maximum) Speed Range of Supplied Fans (RPM) Current Retail Pricing
Cooler Master Seidon 120V 120mm × 120mm 27mm 1 / 2 600-2400 $49.99
Cooler Master Nepton 140XL 140mm × 140mm 38mm 2 / 2 800-2000 $99.99
Cooler Master Nepton 280L 140mm × 280mm 30mm 2 / 4 800-2000 $119.99
Corsair H75 120mm × 120mm 25mm 2 / 2 800-2000 $69.99
Corsair H90 140mm × 140mm 27mm 1 / 2 600-1500 $84.99
Corsair H100i 120mm × 240mm 27mm 2 / 4 800-2700 $109.99
Corsair H105 120mm × 240mm 38mm 2 / 4 800- 2700 $119.99
Corsair H110 140mm × 280mm 29mm 2 / 4 600-1500 $126.99
Enermax Liqmax 120S 120mm × 120mm 32mm 1 / 2 600-1300
600-2000
600-2500
(Multi-range)
$163.00*
Enermax Liqtech 120X 120mm × 120mm 43mm 2 / 2 600-1300
600-2000
600-2500
(Multi-range)
$171.10*
NZXT Kraken X40 140mm × 140mm 27mm 1 / 2 800-2000 $89.99
NZXT Kraken X60 140mm × 280mm 27mm 2 / 4 800-2000 $119.99
Silverstone Tundra TD02 120mm × 240mm 45mm 2 / 4 1500-2500 $118.99
Silverstone Tundra TD03 120mm × 120mm 45mm 2 / 2 1500-2500 $97.99

*The coolers from Enermax are not widely available in the USA at the time of this review, with the only viable option appearing to be that of import from Asia or Europe.

Although Asetek was the first to come up with the design and they hold patents for it, they are not the only OEM of AIO cooling solutions today. At least three different OEMs are behind the kits listed in the table above. We will have a closer look at each one of them in the following pages.

Cooler Master
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  • landerf - Wednesday, February 12, 2014 - link

    This is great, except that many people replace the fans on these coolers and would be most interested in a test using the same 120/140mm fans on all the coolers. To know which one truly is the most effective. Unfortunately this very consumer relevant test is not one I've ever seen done with CLCs. If were to do this, I'd suggest using a common radiator replacement fan like a GT and whatever the community at large considers the 140mm equivalent. Reply
  • Duncan Macdonald - Wednesday, February 12, 2014 - link

    Non-AIO water coolers can give far better noise performance.
    (I use a pair of Zalman Reserator 1 V2 for silent cooling of a 4770K and a R9 290X. Not cheap or portable but VERY QUIET.)
    Reply
  • E.Fyll - Wednesday, February 12, 2014 - link

    And better thermal performance, if I may add. Cost and complexity however are on a whole different level. :) Reply
  • faster - Wednesday, February 12, 2014 - link

    I want a closed loop system for my video card!

    My GTX780 is much louder than my CPU fan.

    Liquid cooling was supposed to be how one obtained high performance quiet computing. Air cooling solutions should not be able to compete with a liquid cooling solution in the same environment, but it seems they do. How is that?
    Reply
  • blanarahul - Wednesday, February 12, 2014 - link

    "I want a closed loop system for my video card!"

    This. All the stupid OEMs want to disgruntle consumers. We already have more than enough great CPU coolers, but very few great GPU coolers. All I want is a card that is NOT pre-overclocked (but can be overclocked at my whims ;) ) and comes with a all-in-one liquid cooling solution. Is that too much to ask??
    Reply
  • E.Fyll - Wednesday, February 12, 2014 - link

    Oh, that is coming, soon. Stay tuned, should be online within a couple of weeks. :) Reply
  • Dribble - Wednesday, February 12, 2014 - link

    True, for cpu's you don't need that big a cooler - all these lower power Intel cpu's don't pull 200W even overclocked. A big air cooler is sufficient. It'll work as well as a single 120mm fan radiator water cooler but is cheaper and more reliable.

    However graphics cards are another matter altogether - they pump out huge amounts of heat.

    Hence either I WC my graphics card in which case I might as well get a system that can WC my cpu too, or I just stick to air cooling.
    Reply
  • BuddhaBum44 - Wednesday, February 12, 2014 - link

    You can always get the Kraken X40 and the bracket they make for 780s: https://www.nzxt.com/product/detail/138-kraken-g10... Reply
  • bj_murphy - Wednesday, February 12, 2014 - link

    Solid review with some good information. I've been waiting for a "compendium" of sorts to link to people, explaining which closed loop coolers are the best. Thanks E. Fylladitakis, looking forward to more great articles! Reply
  • doggghouse - Wednesday, February 12, 2014 - link

    What is a realistic load for a CPU? My 4770K has a max TDP of 84W... and I see a 3960X has a max of 130W. Are there actual CPUs that have anything above that, like 200W - 340W? If not, does it make sense to include those loads in the average thermal resistance, since these AIO coolers are going to be applied to a CPU, not to a synthetic load...? Reply

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