Conclusion

Finding the right balance between cooling performance and noise is definitely a challenge. While traditional air-coolers continue to grow in size and weight to deal with this problem, Corsair fights it from a different angle with liquid. All of the Hydro Series coolers tested today are perfectly adequate at keeping our overclocked Sandy Bridge system cool. Picking a cooler that's right for you basically boils down to cooling performance, what noise level is acceptable, the price you're willing to pay, and compatibility. Corsair did a great job with these coolers in providing many different options to cover a variety of needs.

The H100 provides excellent cooling on the high setting at the expense of noise. This could potentially give you the extra cooling for when you need to crank up the clock speed to try and beat your friend’s score in the latest benchmark (or whatever it is you’re doing). Thanks to the built-in fan controller, you can choose medium or low speed for reduced noise on your day to day overclock. The only major downsides to the H100 are the limited amount of cases that are compatible, and of course, price.

With the H80, you get great cooling with the same ability to turn the fan speeds up or down depending on your needs. The performance penalty compared to the H100 is easily made up in case compatibility and price. With its push/pull design, even the H80 on low speed is a reasonable contender for most needs. You may be wondering why I mention price here when there's a mere $10 difference between the H80 and H100. Compatibility is probably the number one factor in deciding between the two; however, with sites like Newegg listing the H80 at $93.99, price difference becomes more considerable.

The H60 may not be the coolest kid on the block, but it is a good, cheaper alternative to the H80. The H60 doesn't come with a second fan for push/pull or have the built-in fan controller, but the price is much lower. For those with a limited budget and/or need for a cooler with a low foot print, the H60 might be up your alley. Keep in mind, the H60 is still adequate enough in cooling our overclocked test system.

One final area to discuss is how these liquid-coolers compare to a high-end air-cooler. We included the Thermalright Silver Arrow in our results, and it’s one of the best performing air-coolers on the market—with a price and size to match. In terms of performance and noise levels, the Silver Arrow is probably the best option out of the tested coolers. You can pick one up for around $75 online, which is only slightly more than the Corsair H60 and about $18 less than the Corsair H80; the Corsair H100 is the most expensive, but even then you’re only looking at around $100. What you get for the additional $15-$30 isn’t always better performance, but installation of the Corsair water block is substantially easier than that of the Silver Arrow—and that’s assuming you have a motherboard and case with sufficient clearance to begin with. There’s also the lingering question of whether it’s a good idea to have 1.2kg of weight hanging from your motherboard. Considering all of this, while coolers like the Silver Arrow can certainly be competitive, there’s still plenty of reason to consider Corsair’s Hydro series coolers.

Do any of these Corsair coolers give us the perfect balance of performance and noise? If one cooler stood out against the rest, it would have to be the H100. With its amazing cooling ability, built-in fan controller, and the option of adding two more fans for push/pull, I think Corsair has covered almost every possible situation with this one cooler. You get great cooling performance and low noise, though not at the same time. All of this greatness does come at a pretty steep price, leaving room for the H80 and H60. With high-end air-coolers delivering near-H100 performance at a lower price, it's definitely a hard sell, but the H100 still easily gets our recommendation as a more versatile cooling solution. Just remember to pair it up with an appropriate case.

Noise Results
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  • bakedpatato - Monday, November 7, 2011 - link

    Good article; I now know that it's probably not worth it to replace my Xigmatek Dark Knight pre sandy bridge model because there's not that much of a performance delta.
    On that note, why do the big honking air coolers consistently outperform the sealed water cooling units?
  • LoneWolf15 - Monday, November 7, 2011 - link

    "On that note, why do the big honking air coolers consistently outperform the sealed water cooling units?"

    I'm guessing that the following limits hurt sealed H2O units, limiting their ability to compete.

    -Limited amount of liquid (as opposed to a system with a reservoir that would allow fluid to cool more easily during the cycle)
    -Limited volume of liquid that can be carried by sealed units tubing (both due to limited tubing diameter and the limited amount of liquid)

    Also, if you have that reservoir and larger diameter tubing, you can use a higher volume pump to deliver cool liquid faster. None of these are easy to do for a sealed kit, because it increases expense and reduces reliability. These limits prevent sealed systems from greatly exceeding the performance of quality air coolers.
  • Death666Angel - Monday, November 7, 2011 - link

    Unless your reservoir is in the region of several tens or hundreds of litres, the reservoir serves no cooling purpose. In sealed cooling solutions, you don't need it because of the sealed nature (at least if the manufacturer does its job of delivering an air-free system and handles loss of liquid due to dissipation from the tubes adequately). In open/standard water cooling you need it in order to fill and refill your cycle, to have a spot where the air can escape the system, to gauge if enough water is in the system or to get an estimate of the circulation (bubbling water can mean high circulation, flat surface can mean low etc.).

    Once a water cooling solution reaches a certain amount of water flow, increasing the amount will not help the cooling in any way, so the limited flow in these units does not negatively contribute to its lack of performance.

    You also make it seem as though these units use water to cool. That is false. They use air to cool, the water only transports the heat from the generator (CPU) to the radiator. Standard air cooling just cuts out the middleman (water).

    So your reasons are all false, I'm sorry to say.

    It boils down to simple thermodynamics. Look at the surface that these Corsair radiators provide for cool and then compare them to that Thermalright monster and you have your reason for why they don't do better.

    The reason DIY watercooling is so high end is because usually they have at least twice to three times the radiator surface compared to the H100. People with SLI/CF configurations usually go for a MoRa which has 9*120/140mm fans and the respective radiator surface to go along with it. But these tiny 120mm or 240mm radiators used by Corsair do not greatly increase the surface that is available for cooling.

    Also, geometry plays a role in cooling. In order to increase surface in the same dimensions, you can make the fins be more narrow, thus having more fins in the same space. This then influences the air flow through the fins. So narrow fins can be better at high air flow (provided by more powerful/louder fans) or less narrow fins can be used in order to obtain a passive or low-rpm cooling method, which is less powerful.

    (English is my 2nd language so I'm not sure I use all words 100% correctly. Hope I'm understandable.)
  • JarredWalton - Monday, November 7, 2011 - link

    "People with SLI/CF configurations usually go for a MoRa which has 9*120/140mm fans and the respective radiator surface to go along with it."

    Seriously? I've seen plenty of water cooling solutions over the years, but I have never seen anyone with an apparently 360x360mm radiator and nine fans (let alone a 420x420mm radiator with nine 140mm fans). I'm sure that some extreme water-cooling types go for this sort of setup, but I'd wager far more are using 120x240mm radiators, if simply for the fact that most cases won't easily accommodate a larger radiator. If you go with an external radiator tower, sure, you can have a larger setup, but then you really never plan on moving your PC. Other than that, though, I'd agree: it's about surface area, and that Thermalright Silver Arrow is a monster.
  • Death666Angel - Monday, November 7, 2011 - link

    Look through the water cooling forums (one I frequently use is this: http://www.hardwareluxx.de/community/f137/), look especially at the picture threads.

    People who only cool their CPU might go with a 240 setup, but that doesn't really work more quietly, more efficient, cheaper or easier than simple air cooling, as you have shown. So the people who invest the time and money to get water cooling going usually start with a 360 radiator or 420, depending on the case. They can be easily integrated in the usual water cooling cases that get recommended. People who go with SLI/CF will either get 2*360 (or similar), 420+280 (one in the bottom/top, one in the front) or make it easier and mount a 1080/1260 either externally on a side panel or use an external stand. The additional cost of more/bigger radiators is also easily offset, since the base components can remain (CPU heatsink, tubes and fittings/connectors, pump...).

    For my first water cooling I'm going with a 480 (2x2 120mm) radiator mounted on one side of the TJ08-E, which might get expanded to 2*480 once I start cooling my GPU (not going to buy a new card before the 28nm generation and my HD5770 is fine with air for now).

    Of course, my sampling of the water cooling community is limited and there might be a lot of people who don't frequent special forums. But I personally doubt it, since you do need kind of a lot of knowledge about the right tubes, fittings, sizes, water components etc. And the newbies who as in those forums and want to go with "just a little water cooling for the noise" usually get recommended (and convinced of) good air coolers like the Silver Arrow. :-)
  • sticks435 - Monday, November 7, 2011 - link

    I would look in the water cooling threads at overclock.net instead. Most people recommend a 120x3 for an overclocked CPU and GPU, and a 120x4 for an extra GPU. Maybe if you were running Triple or Quad SLI/CF you might need something like what you mentioned, but that is definitely the exception instead of the norm.
  • Death666Angel - Monday, November 7, 2011 - link

    Maybe if it is a high-end radiator or noise isn't that important. But like this review shows, a high end air cooler already competes with one 240mm radiator. And a CPU only uses between 100W and 150W depending on the overclock, whereas a GPU even at stock uses 200-250W. Using only one 360 radiator for a setup that can use 300-400W sounds very noisy and it looks as though air cooling could do a better job then, 2*140mm fans heatsink for CPU and triple 80mm fans for GPU for example are relatively easy to come by, fit in most cases more easily than a whole water cooling kit. :-)
  • Death666Angel - Monday, November 7, 2011 - link

    But, to nip this discussion in the butt: unfortunately neither of us have any real data, so we can only go off our instinct and experience so far. Yours is different from mine, no sense arguing that. :D
  • Etsp - Monday, November 7, 2011 - link

    to nip this discussion in the bud*
    FTFY
  • n13L5 - Monday, August 27, 2012 - link

    If I had a big case that could fit a silver arrow, I certainly wouldn't even be looking at these water things. Cause they are risky by comparison... a pipe could bust and flood the computer with whatever corrosive liquid is in there etc...

    But if you have a small case that has little room above the mainboard, these little systems don't need to beat the silver arrow at all... even the H60 will easily beat anything I could fit over the CPU in an SG05 or a PC-Q08 case. And, the heat goes straight out of the case, not spread around inside the case. I don't know if this test took into account that the mightly Silver Arrow just removes the heat from the CPU but not from the case.

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