Antec Kuhler H20 620 Liquid CPU Cooling System LGA775/1156/1366 AM2/AM3 2000RPM

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The look of my case from the inside is less cluttered and the airflow is also better. I will probably add an other fan in a push-pull configurations. The version I received seem to be a new version from Antec. Here's the differences I see between the version I received and the version that is reviewed by almost all website with a review about this unit:-The plastic clips for Intel or AMD are all black-The screw that old the cooler to the motherboard are now -thumbscrews so there is less chance to broke the fixture.-It is now supporting LGA 2011 socket

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Overall, a good product for what it is intended for. I got it fit in my mITX case and needed something that is better than the low profile coolers. Overall, I am a happy camper.

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Overall it's an excellent product. Other than the installation instructions and misleading marketing info (see below), it's hard to find fault with this product at this price point.People seem to complain a lot that many of these AIO/"amateur" liquid cooling solutions are "no better" (or are "worse") than gi-normous CPU coolers that are like 150mm+ in every dimension and use like 10 heatpipes and two 140mm fans. Yes that may be, but I think these people are missing the point... AIO liquid coolers like the Kuhler 620 have an extremely low profile (at the CPU socket area) and cool very well given that fact. Sure the radiator is a bit large but I've seen the rads squeezed into tiny cases, including my own application into a Silverstone SG06 case where there's not a hope in hell for any decent air cooler to fit in there. The ones that do fit will just spin their fans up to high speeds as well, making unnecessary noise. I tried to get a Big Shuriken into my case but while it would fit the mobo and case alright, it blocked the PCIe slot which I needed to use. So I decided to try one of the liquid coolers after researching a bit, and it's worked out quite well I'd say.On a OC'd Clarkdale Core i3 running at ~3.8Ghz, the difference from the dinky all-alum Intel stock cooler is like night and day. The stocker's fan spun up and down all the time (w/auto fan speed, Intel QST, whatever you want to call it), making some annoying noises...fast, slow, fast, slow, noisy, quiet, noisy, quiet. You get it. And this is just with general startup, web-browsing, flash videos, etc. With the Kuhler 620, even with the [radiator] fan not blowing at all the temps are lower than the stock fan for the same tasks, not to mention virtually noise free. When loading the CPU more heavily, once the liquid starts to heat up, it's definitely required to have the rad fan going though, in order to keep the temp from running away.I chose the Kuhler 620 over some competing products as the hoses are much nicer (compared to the corrogated ones on the Corsairs) and I've seen far less horror stories (compared to models from CoolIT which seem to be prone to explode/leak :O ). The higher-priced 920 is nice with the nifty LED, and USB connection with controls/feedback, but the price was a little too high and the radiator too big for my application as well. (Would be nice if they'd offer a 720 model perhaps, with the same size as the 620 but with the USB connection like the 920, as a mid-price alternative).These AIO liquid coolers used to be a bit more expensive but now the prices seem to have dropped nicely. At the $40 (after rebate) price, you can't really complain. Many of the big air coolers are at and above this price point. The only low points are the non-existent "intelligent fan/noise control" (see my question posted on the product page), which means the best way to run this cooler (IMO) is to provide +12V to the block/pump at all times while connecting the fan (or a different fan(s) if desired) to a speed varying output to control noise. To me, the pump is quiet enough to run at full speed all the time without having to worry about it making noise (plus from other reviews it seems if you undervolt the pump it starts to click). The other thing I'd note as a con, pertains to the install instructions. It *is* easy enough to figure out if you've installed various computer hardware, CPUs, heatsinks, etc. before; but, the instructions only barely help you identify what goes where and how it goes where it does! It seems they've also revised the install parts (no more coloured inserts, instead you have to align two parts together and match up the VERY tiny LGAxxxx markings with respect to what socket you're installing on). The pins that go through and screw in, however, seem better than the old parts where people seemed to complain the plastic bits cracking--I don't think that's really a problem anymore, at least it wasn't for me. :)One other note is that the layer of pre-applied thermal paste seems like a bit of overkill but I guess the product does cover various CPUs and socket mounts so maybe the large area is required. I thought of removing the paste and instead using some AS5 or MX-2 that I had but in the end I didn't bother. Seems to work great with the pre-applied paste anyway.Definitely recommended! One star removed for the minor caveats.

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After reading my new CPU would be between 36C and 50C idle with the stock Intel HSF and seeing the small size of it I started researching alternatives. The Kuhler took this down to 26C a couple of degrees above room temp.This fits exactly what I was looking for. Great design form and function and at a price that makes it stand out.Very pleased I went with this.

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This is a great CPU water cooler. Affordable and performs well.

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really good cpu cooling nice for overclocking keep my cpu at really low temperature. I recommand it. same thing then the h920 if you put another fan on it. very quiet and it is really easy to install

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-A nice to have if you want to do "light overclocking" on your CPU. Looking at the bench. you will see that for a i7 3770K at 4Ghz give a fair temperature!-Equivalent to the Corsair H60 in term of temperature.-Very usefull!

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great buy for the price :)got it for around 55$ on sale, can't beat it

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Le produit est tres bien emballé, Les instructions d'installation sont tres mal fait et manque de clareté. Par contre, une fois installé, le fan est silencieux et la temperature de mon cpu ce maintien entre 35 et 45.

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Even though the intructions aren't that great, the AM2 and LGA1155 installation went very quickly.I installed the 620 on an overclocked x2 5200 black edition (3.4GHz) and it is more than capable of the task. Cools better than the thermalright (ultra 120?) + 104CFM panaflow combo I had on it previously. and much quieter.I did install a Cheap Zalman 120mm fan on the front of the rad using the resistor o keep it quiet. The screws you need are 1" 6-32 thread screws. 1+ 1/4" if you want to use a washer or something.Very happy with this purchase but would not recommend this for anything quad core.

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ive been using it for sometime and i really enjoy it

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After some hours, the pump was making this "click click click" sound. To solve this pump noise problem, I had to go into the motherboard bios and disabled the CPU fan speed control in order to feed the pump full power. It seemed that whenever the bios goes into quiet mode where it would feed the pump like 1/2 power, the pump didn't like it. But once the pump gets full power from the CPU fan header, the noise stopped, and it works admirably.Setup: Intel Ivy Bridge 3770K d 4.3GhzIdle: 30 degree CelsiusMax Load (prime95, all cores): 60 degree CelsiusGamimg: 46 degree Celsius

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Didn't use the stock fan and replaced it with a Noctua fan in intake/push. Good deal since I price matched it for 44.99 but it went on sale for the same price afterwards anyways.

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as long as it last me a few years, i'm very happy with the product now that it's installed

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Very quiet after changing the fan that came with it.Gets the job doneNeeded to RMA first one because of pump noise.

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I bought this because I did not want a massive loud heatsink. I wanted to try this watercooling since it is lighter and quiet.One problem with the Kuhler 620 is its mediocre installation instructions. They are incredibly difficult to interpret and are not detailed. I had to resort to watching installation instructions on YouTube to get it installed, which still was difficult.Another problem is actually mounting it. You need to fit the mounting ring then slide and lock the cooler in place with the grooves. I could not get this done. Other reviews suggested I install the cooler first, then secure it with the mounting ring afterwards. The last problem is the build quality. It comes with colour-coded screw mounts. Once fastened, the screws bend and damage these mounts.

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Easy to install, good performance, really good cpu cooler.

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Good product, i would buy this over the other products

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Bought it to replace stock cooler on a Phenom II 1055t, now have it overclocked to 3.6GHz from 2.8. Runs so well, one might think it was a fridge.

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Read reviews that the fan with this kit wasn't super quiet. Replaced with 2x ARCTIC F12 PWM fans in a push/pull configuration. I hooked the pump to the PWR1 header of my ASUS P8Z68-V/GEN3 motherboard and each of the fans to the 2 CPUFAN headers. Fans get controlled by mobo but pump is constant speed. Fairly quiet and keeps my i7 2700K nice and cool.Tip: for 1155 installation; use 1156 labels on the rear bracket. Read the fine print on the bracket as the holes are not in the same spot on all the corners. Bracket is not supposed to be straight on the rear.

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Fantastic cooling, keeps my Q9450 at 14C no load, or 23C full load. Couldnt be happier. Also very quiet, much lower than the stock Intel cooling fan.Very poor instructions. Mounting brackets are colour coded, but there is no reference to which colour used where. Instructions are small with very little text to explain, and small diagrams which are hard to read. Suggest viewing on line installation videos before hand. I didnt and found out later I the clips backwards. Also, you must have access to the back side of the motherboard to install the mounting bracket. Its not clear from the instructions that this must be done.Five star for performance, but four star for instructions.

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Placed into an Antec 900 case with high airflow and added an extra fan in front of the unit. My Core I7 2600 runs at a constant 32 Celsius. I have no complaints. The mounting position should be carefully chosen and planned.

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I just got this installed, was looking for something to OC with, I was at 46C with stock cooler, with Phenom 2 Quad core 3.4 Black Edition, but now running at 3.9 stable for now at 36C. Going to test this out for a bit as it Blue screened on my the last time I OC'd. I am loving it though seeing as I was at 22C idle no OC.

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I use this on a overclocked 2500K (4.6GHz) and it maxes out in Prime95 at ~72C core temps in a ~22C room (temps up to 80-85C are no problem for these chips). I'm using an old uATX case, however, and the radiator is forcing air out through a somewhat restricted orifice so it would cool better with better airflow. This is using the stock heat sink compound that came pre-applied as well... not sure if that makes much difference. Overall, it's a slick looking and well-performing unit.

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I am very pleased with the 620, the water colling unit is extremely quiet along with the fan, it also does a great job of cooling. I wouldn't say this is for the extreme gamer that is wanting to beat a overclocking record but for basic overclocks it's fantastic.The instructions are horribly done I have to say, which is the only thing holding this item back. Find this on sale though and you would be stupid not to pick it up if your considering fan / all in one water based.Running my 2500k h 4.5ghz temps are idle h 29 load is 60. I could go further easily but no point, as 4.5ghz doesn't get used on anything.