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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 37 of 37 reviews - Clear Filters

  • Keith S.
  • 10/17/2014 8:26:59 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsForm VS Function

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

Pros: this build went much better than expected for a $50.00 case. My build issues were all about the power supply and its short cables. it is incredibly quiet. It has fan controllers for up to 6 fans, they are easy to find. Case has 5 120mm fans that are very quiet even on high settings

Cons: I was not happy with the 2.5" mounting system. it left the ssd quite loose. some double sided foam tape will help this out a lot on the tray side

Other Thoughts: I barely had enough 8 pin motherboard power cable for my GA-79X-up5 motherboard. it was very handy that the top pops off and the rear fan was right over the plug to aide in getting the plugs in.

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

  • William S.
  • 10/16/2014 9:36:06 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGood Value!

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

Pros: Small
Not too loud
Good Cooling and Heat Transfer
Tubing is nice and flexible
Good Looking

Cons: Not for serious overclocking
Wish the fan was not mounted like it is

Other Thoughts: Bought this for an inexpensive AIO to put on and overclock a Pentium G3240 Anniversary chip. Managed to get 4.4ghz stable while keeping temps under extreme load down to the upper 70's (Celcius). Not bad for an inexpensive AIO like this and it honestly spins the fans nice enough to keep noise levels down under all scenarios. Like the color changing LED that tells the temps as it looks great through the side view panel that my client appreciated it.

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

  • Scott F.
  • 10/9/2014 7:47:22 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsIneffective

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

Pros: Looks slick, install wasn't too difficult. Build quality is decent.

Cons: This did not perform well with the intel i7 4820k, perhaps the 1250 would have been a better choice with twice the radiator surface. I would suggest it is probably not a great bang for buck for this reason.

Other Thoughts: I'm replacing mine with an air cooler in the same price bracket.

Did you find this review helpful? Yes No

  • Brian K.
  • 10/5/2014 12:01:36 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsdoesn't work

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

Pros: The light's kind of cool.

Cons: Horrible. I thought this was an upgrade. Computer overheats and hangs. Often, when I come home, I see the red light glowing and the computer is non-responsive. After I hit the reset button and reboot, I see the CPU temp at 70+C. The chassis temp at ~30C.
If I do anything at all on the computer, the CPU temp goes to 60's and sometimes 70's C within seconds. I can see it go up a degree every second or so. This is with the CPU at ~20%. Just turning on the Media Center or video streaming does it. 120mm fans screaming it 2700 RPM.
I have it set up with dual fans (push/pull) and the air coming out is barely warm, only at the bottom. I am convinced there is little coolant in the system or it's blocked. I didn't think I needed to fill this before use.

Other Thoughts: Mail in rebate makes returning impossible.
I'm running Vishera 8 core and it does run hot, the whole point of liquid cooling.

Did you find this review helpful? Yes No

  • Francis M.
  • 10/3/2014 12:53:27 AM
  • Tech Level: High
  • Ownership: more than 1 year

5 out of 5 eggsWorks very well.

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

Pros: Makes my processing unit cooler, I had lots of heating problems at first but this solved all of them.

Cons: Makes a bit of noise but I don't really mind it.

Other Thoughts: Maybe one of the best addition I got for my gaming PC.

Did you find this review helpful? Yes No

  • Benjamin 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

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Item#: N82E16835209078
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