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Antec > 
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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Learn more about the Antec KUHLER H2O 650

General

Brand
Antec
Series
H2O 650
Model
KUHLER H2O 650
Type
Liquid Cooling System

Pump

Pump Dim.
4.7" x 2.0" / 120 mm x 50 mm (Fan+Pump)

Radiator

Radiator Dim.
6.3" (H) x 4.7" (W) x 1.0" (D) / 159 mm (H) x 120 mm (W) x 27 mm (D)

Features

Features
The Antec KUHLER H2O 650 delivers high-performance liquid cooling for your CPU in a quick, easy-to-install package.

Unlike traditional liquid cooling systems, this self-contained unit comes prefilled and requires no maintenance.

The extra large pump circulates coolant through optimized water channels, while easy-bend flexible tubing allows the KUHLER H2O 650 to be installed in nearly any orientation.

In addition to easy installation, a powerful PWM fan pushes air through directional blades and channels it through the radiator for optimal cooling.

Included in the box is an air duct that reduces static pressure which in turn, allows air to flow out of the case efficiently.

Lastly, integrated firmware automatically adjusts fan speed and changes the RGB LED based on temperature.

Engineered for maximum performance, the Antec KUHLER H2O 650 delivers liquid cooling performance at an air cooling price.

Quick Info

Warranty

  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years


Customer Reviews of the Antec KUHLER H2O 650

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Showing 32 of 32 reviews - Clear Filters

  • Ben G.
  • 9/2/2014 9:07:39 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

4 out of 5 eggsKuhler 650

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

Pros: Packaged well
Self contained unit
low mounting height on MoBo

Cons: Difficult mounting with included backplate

Other Thoughts: This installs well if you use the original backplate that comes with your mother board. The included kit is touted as being super easy to install, but the screws do not make it in to the mounting holes and the metal inserts fall out. Also, the retention springs are way too stiff and inflexible. I ended up using the stock backplate option and the shorter screws and it worked fine.

Did you find this review helpful? Yes No

  • Paul D.
  • 8/26/2014 5:18:27 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsGood, but expected more

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

Pros: Effective, efficient cooling technology.
Works as advertised.
Less bulky than the good traditional heat-sinks
Seems well constructed.
Looks nice.
Antec replaced it when it failed.

Cons: Doesn't perform any better than *cheaper* Peltier-based (thermoelectric-effect-based) cooler it replaced.
Wish I had bought the model one step up with a bigger (deeper) radiator.
Doesn't fit (correctly) in Antec's own 900 chassis, very disappointing.
Difficult to affix cold plate.
Failed after 3 months.

Other Thoughts: At idle, it cools amazingly well. But, under full load (SEIT@Home), it might even perform worse than my old Peltier-based cooler. That was disappointing. Technology is better, overall, though, so I'm still glad I bought it.

It's better because of the liquid coolant which uses a radiator that installs onto chassis external fans. So, it doesn't torque the mainboard like other coolers types. And, even better, it exhausts directly to the exterior and, if you want, you can install your own second 120mm fan. You can easily improve cooling performance installing a high-flow pulling fan. But, that's loud, and getting the model with a bigger radiator with the money.

Also, it is difficult to attach cold plate (with screws) to CPU mount. Of course, I expected it, but not in this particular way. The mounting system uses removable nuts on the under-plate. So, it's possible to dislodge the nut when trying to affix the cold plate. It didn't happen, but I was worried it might and that made it extra difficult to install.

Lastly, it did fail in an odd way. The good news is that my CPU didn't burn up immediately. It actually just stopped cooling well. My system was overheating and eventually crashed, but it didn't permanently damage the CPU (AFAICT). Antec seemed pretty cool about replacing it and advanced me the replacement, though I had to pay for a replacement and get a refund after I returned the old one. That was fine and completely worth it because I didn't have to rebuild the box twice.

Did you find this review helpful? Yes No

  • John Y.
  • 7/11/2014 8:43:31 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month

3 out of 5 eggsLoud...when at high speed. Cools well though

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

Pros: Quality is decent. Doesn't seem too cheaply made..Radiator is solid and tubing feels secure. Block seems fairly well made.

Cons: LOUD when above 2,000 rpm . Really is a shame..Antec needs to work on their fan design pretty badly... I have 3 120 mm fans a 140mm fan on my psu, and a 200mm exhaust fan on the top of my case...all of them at 100% are quieter than this thing above 2000 rpm...Although it does cool quite well, the fan noise kills it for me. Also, the 1155 bracket system is a joke. I ended up zip tying my block to my motherboard....

Other Thoughts: I got this for a good price and was disappointed on a few things...It does cool well though! I am having good results over my Arctic cooling air cooler. (silent btw, compared to this monstrosity of a fan design..)

0 out of 1 people found this review helpful. Did you? Yes No

  • Ross W.
  • 7/11/2014 12:46:20 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

4 out of 5 eggsGood for the most part

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

Pros: definitely keeps cool, fairly quiet, but still audible, installation was easy for the most part

Cons: the one part of the installation that was hard was putting the screws into the back plate, prepare to struggle for a bit on that.

Other Thoughts: mine was almost DOA, when I got it installed and everything, I still had my case open thankfully because when I booted, the fan didn't spin, it just jiggled every once and a while, so I concluded for the time that it didn't need to be running or something.

but when I started my stress test the temps got up to 60C and it still wasn't spinning, so I pushed it in the direction it should spin, and it started, but very slowly, and the CPU was still climbing in temps, and it wasn't long before it the fan stopped again

I noticed I can see the internals of the fan, something I probably shouldn't be able to see, so I grabbed it by the blades and started pulling it towards the pump, and thought I was going to break it because I had the blades almost at a 20 degree angle, the POP! the fan popped backwards and started spinning extremely fast (the CPU was at 85C at the moment) and almost took my a finger...

that was my issue

3 out of 3 people found this review helpful. Did you? Yes No

  • TRUNG N.
  • 6/25/2014 9:26:46 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsNot bad at all ... requires some patient and ingenuity

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

Pros: Nice compact unit , Blue LED light on the coolplate in the dark.

Cons: Harder to install compare to my previous cooling system.

2 out of 3 people found this review helpful. Did you? Yes No

  • David L.
  • 6/12/2014 2:23:13 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsGreat but complicated problems

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

Pros: Excellent cooling when it was operating properly.

Cons: I reboot my computer frequently when getting everything in working order or cleaning any dust from the case. However after a month or so of use the CPU fan i.e. Khuler 650 decided to start producing lower RPMs and even grinding to a dead halt of 0 RPMs while the system is running. For the first time I came to my PC after waking up and I have a warning on my desktop telling me this cooling system is running at 0 RPMs. If you ask me this could be a critical failure that during any point you're not consciously aware or capable of looking inside your rig during a gaming session... Well simply put you could ruin your equipment due to this issue. I have no idea what caused this problem and or why it just decided to start doing this. Hopefully someone from Antec might be willing to discuss this.

3 out of 5 people found this review helpful. Did you? Yes No

  • Jesse D.
  • 5/21/2014 7:29:36 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsSmall

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

Pros: Radiator mounted impeller.
Sealed unit.

Cons: Equipped radiator and fan is a bit small (120mm instead of 140mm).
Instructions were not that great, especially with the power hook up.

Other Thoughts: My plan was to make this a push pull, however the fan and radiator could not handle a 140mm fan which I had on hand. I am not sure if anyone owns 120mm fans anymore unless you have a pre-build system. The only good thing about this was it made it easier since i mounted a 200mm fan at the top.

1 out of 14 people found this review helpful. Did you? Yes No

  • Anonymous
  • 5/15/2014 11:57:15 AM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day

1 out of 5 eggsMoBo

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

Pros: Looks cool..... in the box!

Cons: I bought it from a retail store and can´t install it in any of my 2 MoBos, universal bracket comes into contact with capacitors, diodes, etc.. it is low profile bracket so to install it you need a MoBo like B85 or something, i don´t know what does Antec was thinking when they designed this water cooling...

Other Thoughts: Don´t buy it...

4 out of 10 people found this review helpful. Did you? Yes No

  • Anonymous
  • 5/5/2014 5:51:01 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsmy first water cooling system

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

Pros: Comes prefilled, no maintenance required and works well. Relatively easy to figure out how to install, especially if you have installed any other aftermarket cpu cooling systems, air or liquid.

Cons: Instructions seem almost deliberately vague, as is the case on other aftermarket components. Some of the screws seem questionable in length, I was only able to.get about 1/8th of an inch into the rad when mounting it to the case. And the mounting bracket was not fun, but in comparison to the hardware included for a hyper 212 evo on the same setup, I would have to say this one was actually easier overall.

4 out of 4 people found this review helpful. Did you? Yes No

  • Chevonna J.
  • 5/3/2014 12:42:31 AM
  • Tech Level: High
  • Ownership: less than 1 day

2 out of 5 eggsSome Ingenutiry Required

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

Pros: It works once you make your own mounting kit.

The product design in person is neat.

Cons: NOT mountable out of the box.

The box didn't include any of the 1155 LGA screws. Following that, the screws given for the AMD and Intel 2011LGA did not fit the included standoffs they screw into. It was essentially trying to push a cube in a triangular hole.

Even if I had tried, the included springs where engineered not to compress, the amount of need pressure for me was spooky to the point where if the screw went out of alignment, if fear i'd puncture the motherboard..

I actually ended reusing the old mount and screws till i can get some washer spacers. The mounting kit hardware feels like they just tossed any old parts lying around in the box with no Quality Control for test fitment.

Temps are hovering around mid 60*C full load. on a i7 2600k, once i find some spacers, it may contact better.

Other Thoughts: Really, the included mounting hardware just blows. This is the worst mount Ive ever seen Having brought this to replace a H60, i have no regrets about the effort needed to mount that.

Antec really dropped the ball here, it needs a revision, stat.

4 out of 7 people found this review helpful. Did you? Yes No

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Item#: N82E16835209078
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