Closed Loop AIO Liquid Coolers: 14-way Mega Roundup Review
by E. Fylladitakis on February 12, 2014 7:00 AM ESTCorsair H90
Corsair's Hydro H90 is sort of a bigger brother to the H75. It is the only AIO cooler from Corsair in this roundup that comes in silver packaging, as for some reason the company did not use its usual black-based color theme; most likely because of the all-black color of the cooler itself. Although the bundle is limited to the basics, a manual with installation instructions and the installation-related hardware that is, it is interesting to note that everything, down to the last screw, is black. The included 140mm fan is black as well and is a model with narrow blades and relatively low operating speeds, ranging from 600 to 1500 RPM.
Black, black and more black; these words can easily describe the H90. The radiator is a wider version of the same radiator used by the H75, built for 140mm fans instead of 120mm. Nevertheless, that's over 25% more heat dissipation surface, giving the H90 a significant advantage. The radiator appears well made, yet fin deformations can be easily spotted, therefore it is far from perfect. Smooth, rubber and kink-resistant tubing is used; Corsair does not appear fond of corrugated tubing.
The pump-block assembly is round and very simple. Corsair's logo has been printed on the top of the assembly and there is no lighting or anything else worthy of discussion about this block. It apparently is the simplest design that the OEM (Asetek) offers. Thermal compound is again pre-applied on the copper base of the cooler.
Corsair H110
The Hydro H110 is the largest AIO liquid cooler that Corsair currently offers. It comes supplied inside a black cardboard box with a red theme, marking it as one of Corsair's "extreme performance" products. The H110 shares the same bundle as the H90. Inside the box there is a manual with installation instructions, all-black mounting hardware that is supplied categorized inside separate nylon bags, plus two black 140mm fans, also identical to the fan supplied with the H90.
On first sight, it becomes apparent that the H110 is little more than an oversized version of the H90. The radiator has the same thickness but twice the length, allowing for the installation of two 140mm fans on each side, so up to four 140mm fans total in a push-pull configuration. Despite the relatively thin 29mm thickness, the 140mm × 280mm radiator is hefty and will not fit inside many cases, which is the most significant disadvantage of the H110. The rubber tubing is only about 30cm long, which is enough if the radiator is to be installed at the top of a case but not long enough to reach virtually any other viable position. In short, this is a cooler that will need to be matched to a limited case selection.
The same simple round pump-block assembly as that of the H75 is used on the H110 as well. Aesthetics aside, as there is nothing really left to discuss about that, we found it strange that such a small ceramic pump can create a pressure significant enough to cope with the flow resistance of such a large radiator. It is highly likely that the performance of the whole setup will be limited by the low power of the pump. Thermal compound has once again been pre-applied on the copper base of the cooler.
Corsair H100i
Although it is not the most powerful AIO cooler that Corsair currently offers, the H100i is their pride and joy, therefore it could not be missing from this review. As every other AIO cooler rated as an "extreme performance" product, Corsair supplies the H100i in a black cardboard box with a red color theme. The bundle of the H100i might appeare a little richer than most, but it's not. Aside from the manual with the installation instructions and the mounting hardware, there are the cables required for the use of the cooler and a small advertising leaflet with Corsair's latest products; nothing of particular note. Two 120mm fans with wide grey blades are included, the same fans supplied with the H105 to be exact, which have a speed range of 800 to 2700 RPM.
Out of all Corsair's AIO cooling solutions in this review, the H100i is the one that really stands out. Unlike any of the previous Hydro models discussed in this review, the H100i is not made by Asetek; CoolIT is the OEM behind it. The 120mm x 240mm radiator is similar to that of the H105 but considerably thinner, at only 27mm deep. It is of almost identical design, with wavy aluminum fins soldered on the liquid pass-through channels; however, although it might only be a coincidence, we should note that the number of deformations/imperfections of the fins is notably lower.
The block-pump assembly is rectangular, with a shiny, highly reflective black top cover. The company logo lights up once the pump is powered on. On the side of the assembly, there are connectors for the fans and the USB interface of the system; this model is compatible with Corsair's Link software, allowing almost complete control via software. We should note that the power connector of the pump is not the usual 3-pin fan header connector but a SATA connector instead, as the assembly needs to power up to four fans, the pump, and all of the electronics of the interface as well. Thermal compound has been pre-applied to the copper base of the assembly, which is very smooth and polished down to a mirror finish (the grainy appearance of the block in the picture is actually due to reflections from the environment).
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Dustin Sklavos - Wednesday, February 12, 2014 - link
Good lord.If I'd known my successor would produce results this thorough I'd've stepped aside a long time ago.
Really well done piece of work.
E.Fyll - Wednesday, February 12, 2014 - link
Thank you for the praise Dustin, yet I still stand unworthy of it. :)Dustin Sklavos - Wednesday, February 12, 2014 - link
I'm enjoying your work tremendously. Now that I'm at Corsair I'm glad we have someone we can send case/cooling/PSU hardware to that meets and beats the AnandTech standard.creed3020 - Wednesday, February 12, 2014 - link
Yeah Dustin....I have seriously enjoyed your labors here at AT and do miss them. Your successor has changed the paradigm so much that it's hard to compare, but it's a awesome reboot to this area of reviews here at AT.I, however, have to agree with many other commenters that a secondary dataset produced with the same 120mm/140mm fans does have it's merit as it will provide an objective evaluation of the radiator and pumps. This is one area where I am really curious to see quality differences in the products. I am fully aware that each OEM is very careful in their selection of a fan which matches their product. This is not done by lottery, that much is clear to me. The OEM behind the Silverstone/Enermax product intrigues me, as I am a fan of Silverstone products and use their cases exclusively for all of my desktops, gaming PCs, and HTPCs. The Tundra's seems like they are ripe for a revision!
BigLeagueJammer - Wednesday, February 12, 2014 - link
Under Noise Level Reference Values, your first one of <35dB(A) being "Virtually inaudible" doesn't match up with most sources I've seen. Most rate that as "very quiet" and say the limit of human hearing as 10 db(A). If other sources say things like a ticking watch is around 20 db(A) which in a quiet room is easy to hear, then 35 seems too high for your qualification of "virtually inaudible".E.Fyll - Wednesday, February 12, 2014 - link
True, I am afraid that the lot of "copy/paste-ing" online has produced a lot of bad information going around. Some are works of fiction, some are misinterpretations of confused people, some...I don't even want to know.So, copying my answer from above:
"Sub-35 dB(A) levels are generally impossible to notice by a human ear. Sub-30 dB(A) levels are next to impossible to record with anything less than science lab-grade equipment. There is no handheld or desktop dB(A) meter that can perform such readings. If you have seen reviews stating sub-30 dB(A) levels, make sure to check their methodology (given that there is any). Either the meter cannot read lower than 30 dB(A) (and/or will display a bogus reading, as most cheap Chinese meters do) and the review is a fictional text or their methodology is based on dB readings, not dB(A) readings, which is useless to a consumer."
I think it will suffice for me to say that you cannot possibly hear what an instrument designed for this specific purpose cannot even record. In theory, the human hearing threshold is 1 dB(A); in practice however, that is true only for specific frequencies. The background noise of a typical room is almost always above 32-33dB(A).
Jon-R - Wednesday, February 12, 2014 - link
What is your opinion on the tests done over at SilentPCReview? They test using lab-grade equipment. A rundown can be found here: http://www.silentpcreview.com/article875-page2.htm...They use reference fans which measure around 13dBA at their slowest fan speeds, and they don't think highly of AIO water-cooling at all, as none of the tested ones have come close to the best air-coolers when it comes to quiet cooling.
E.Fyll - Wednesday, February 12, 2014 - link
From what I can see, they are using a highly sensitive microphone and a computer's sound card to record the results, connected through an amplifier. Although the equipment is very good, this is not "lab grade equipment" but just a customized setup. A very good setup nonetheless, including an anechoic chamber. They have a microphone with a self-noise of 8 dB, which measures 11 dB(A) inside the aforementioned anechoic chamber.It will suffice to say that their results are just in no way comparable to mine. Actually, as noise level measurements are environment-specific, you should only compare the results of a same setup, never in-between different setups. Unless they are all science labs with multiple ISO certifications, of course. Given that my room floor noise level is over 30 dB(A) and they are using a sub-12 dB(A) anechoic chamber, I believe that I do not have to stress how different the results out of these two setups are.
As far as equipment goes, for example, this is a cheap lab grade sound analyzer and still costs 5 times more than the whole setup that you showed me, microphones and secondary equipment aside:
http://www.nti-audio.com/en/products/flexus-fx100....
Jon-R - Wednesday, February 12, 2014 - link
But you're not saying that their measurements are inaccurate, only that they've got a significantly lower noise-floor than what you're using? So it boils down to the difference between what is considered silent? Because 30dBA is louder than their reference fan it its loudest setting, and far beyond what they consider acceptable. Just as a reference, they measured 43 dBA for the Silverstonde TD03 at 12v, and 30 dBA at 7v.E.Fyll - Wednesday, February 12, 2014 - link
"Inaccurate" is a harsh word when it comes to sound pressure level measurements. Although I would not hesitate to use this word for most other types of tests, there are far too many variables at stake here. I believe that their setup may be better than mine. I am just using a good handheld sound level meter, with the product positioned in the middle of a standard room.I would simply stick with "different".
Sound levels are additive. If you have a noise source of 20 dB(A) and added another source of 20 dB(A), the room noise would not be 20 dB(A) but 23 dB(A). A third source would make it 24.8 dB(A) and so on. So, a fan that would measure 18 dB(A) inside an 12 dB(A) anechoic chamber, will still add to the 30.4 dB(A) floor noise of my room. The difference is the magnitude, as the scale is logarithmic. As you said, the TD03 added about 18 dB(A) and 30 dB(A) to their setup, when it adds 8.3 dB(A) and 17.7 dB(A) to mine, because of the higher background noise. These differences are in no way comparable to each other; that is only possible when the scale is linear. The further you move up the decibel scale, the largest the increase of SPL becomes per single decibel.