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Item#: N82E16835209078

Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

  • 6.3" (H) x 4.7" (W) x 1.0" (D)
  • RGB LED
  • powerful PWM fan

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Antec KUHLER H2O 650

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Customer Reviews of the Antec KUHLER H2O 650

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  • Gabriel S.
  • 3/21/2016 6:41:19 AM
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsGreat product! Easy to set up and use.

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: - Temp rarely goes over 100F
- No setup other than mounting it

Cons: - Loud

Other Thoughts: I pretty much ignored the directions and did it with past experience of replacing heatsinks. The funny thing is that my case didn't have a mount big enough for it so I just had it outside of the case until I dremel'd a mount for it. I also directly hooked it up to the cpu fan port on the mainboard.

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  • Anonymous
  • 2/28/2016 4:48:33 PM
  • Ownership: 1 month to 1 year

4 out of 5 eggsGood cooler

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: Good cooling. Great for over clocking. Oced my i5 3570k form 3.4 to 4.4. Runs at 60c when at full load. 30c at idle. I imagine if this wasn't overcloked it would run cooler
Rgb lights are nice.

Cons: Hard to install. Took a very long time to instal. Loud fan(not really a con for myself) no guide to what tempature range the CPU is in when showing the light.

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  • Matthew C.
  • 11/4/2015 12:44:47 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsExcellent budget AIO

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: Quiet, functional, looks good.

Price makes this appealing, and it functions well enough!

Cons: None so far.

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  • mickie s.
  • 10/30/2015 11:00:14 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsGood for a while.

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: It kept my 3570k cool when doing a little gaming in a mini itx set up.

Cons: I noticed this beep sound when in windows, almost like sonar in the distance. It's the sound you hear when a dvd drive goes bad or can't read a disc but almost like clockwork every 5 seconds. It's obviously not a beep code so if you hear it then know that it means most likely this cooler's fan is rocking back and forth not cooling your cpu in the least. Luckily it gives you the option to add a 120mm fan for push pull cooling of the radiator. Always use that when cooling a radiator in case a fan fails. As of now the kuhler fan is limping and my back up is saving my cpu. Temps are ok with open window for now but I gotta send this thing in. When the computer starts up the fan will hit high rpm but then it just gives up and I have to spin it like a propeller to get it up to maybe 60RPM. 6 months in and it does this and it has a 3 year warranty! I switch up fan connectors and everything to no avail, the second fan still works perfectly.

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5 out of 5 eggsGreat Product

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: Large slow turning fan runs super quiet and the cooler keeps my 8 core AMD CPU super cool. This is the best performing CPU cooler I have ever owned. Easy to install & looks great. Liquid cooling is the only way to go.

Cons: Pump failed after about 9 months but Antec's service was great they sent me a replacement and the replacement has been running great for 2+ years now.

Other Thoughts: This is my first liquid cooler and the experience has been great. The CPU runs cooler than ever and the system looks really cool inside the case. Overall I give Antec a thumbs up & when I am ready to build my next system I won't hesitate to use Antec again.

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  • Barry W.
  • 9/3/2015 12:07:24 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsNice... for a while

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: The unit was fairly easy to install, even in a tight case, and it worked well for a while. When first installed, it was fairly quiet and kept the CPU nice and cool. The LEDs are a nice addition.

Cons: Unfortunately, I'm already through my second unit. The first one was DOA and RMA'd immediately. My second one didn't even last a year. I think the pump is defective or the tubing is clogged because it cannot keep my CPU cool. It just continuously ramps up the RPMs until it's a jet engine and still the temperature continues to rise. I've had to shut my machine down to protect it from thermal overload. I will have to RMA this one two, but I'm switching to a Noctua air cooler, which is more expensive but hopefully better performing and quieter.

Other Thoughts: I really wish I could recommend this unit, but after having two go belly up on my, I really can't.

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  • Anonymous
  • 9/2/2015 7:22:36 AM
  • Ownership: 1 month to 1 year

3 out of 5 eggsStopped working

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: Was working very well, kept it below 56C when under load, 23-27 idle.
The light is pretty cool.

Cons: Stopped working after ~7 months.
Noisy fan.
Kind of a pain to install.

Other Thoughts: It worked very well for my first cooler but I expected it to last longer than 7 months. Oh well.

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  • michelle l.
  • 8/31/2015 6:03:17 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsHas Never worked 100% correctly

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: Led Light

Cons: Has never worked properly. Others have complained about fan noise and leaks, I have not experienced either of those. Since the day I installed it it has had an issue with sudden temp spikes. Only way I have been able to fix it is to reach in my case and wiggle the coolant lines. When i do this i can watch temps drop on H/W Monitor and Speccy in 3-5 degree intervals.

It has been that way since Day 1, Ihad 1 mobo and 1 cpu burn up however at the time i thought it was due to a mobo issue. Now I think it was this cooler all along.

Sometimes at Idle my temp hovers around 22C other times 35C and on some occasions 55C, Under Load i get temps as high as 90C which is p[retty insane for Liquid cooling on an amd FX-8350 that is under clocked to 4GHZ and turbo turned off.

Will probably never buy another of these and will never recommend to anyone to buy this product. I will be switching back to OEM heatsink and fan.

Other Thoughts: I havent tried to RMA as up until recently i didnt know this was the culprit

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  • Austin K.
  • 8/25/2015 5:24:18 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggs

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: price

Cons: Stopped working, hit temperatures of 100C on 5% load (max readout); Stock cooler does a much better job and is quieter.

Other Thoughts: Skip this and use stock cooler or a better product.

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  • Steven Y.
  • 8/3/2015 4:13:38 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsA Failure

This review is from: Antec KUHLER H2O 650 Water/Liquid CPU Cooler 120MM

Pros: Small, quite

Cons: Sloshes due to air in lines never worked correctly.

Other Thoughts: This from the day I bought it had issues, while I was able to fit it in the case without doing a discounnect I wish I had because the lines in these never come full and bled out, the pump broke and always flashed never remaining solid, I did all the research I could into this issue

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Item#: N82E16835209078
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