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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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The Antec Kuhler H2O 1250 provides maximum-performance liquid cooling for your CPU, and delivers best-in-class performance in a quick, easy-to-install package. Unlike traditional liquid cooling systems, this self-contained unit comes prefilled and requires no maintenance. Two 120mm PWM fans ensure quiet, efficient cooling, while the 240mm radiator maximizes the cooling surface area to dissipate heat from the highest performance CPUs on the market. In addition to an extra-long radiator, two extra large pumps work in unison to rapidly circulate coolant through the Kuhler H2O 1250. Designed to unlock the maximum potential of your CPU, the Antec Kuhler H2O 1250 delivers exceptional cooling when you need it the most.

  • newegg High Cooling Performance The dual 120mm Pulse Width Modulation (PWM) fans are fused with directional blades that channel air through the radiator for optimal cooling.
  • newegg Monitoring and Control The included Antec Grid software helps you monitor and control the Antec Kuhler H2O 1250's performance, and allows you to customize its stylish RGB LED.
  • newegg Self-Contained Cooling System The Kuhler H2O 1250 comes pre-filled, and never needs refilling or priming.
  • newegg Easy Deployment Easy-bend tubes allow for maximum flexibility in radiator positioning.
  • newegg Universal Compatibility The Kuhler H2O 1250 includes a newly designed universal mounting bracket that works with either an Intel or AMD CPU.

The Antec Kuhler H2O 950 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 zero maintenance. The dual 120mm PWM fans and extra large pump ensure quiet, efficient cooling, while the double high radiator is equipped to cool any high-performance CPU on the market. An integrated fan, pump, and radiator allow the coolant to circulate through the radiator at a higher velocity, which in turn increases cooling performance. Take your PC's quiet computing to the next level with liquid cooling performance at an affordable price.

  • newegg High Cooling Performance Dual powerful PWM fans pushes air through directional blades and channels it for optimal cooling.
  • newegg Monitoring and Control The included Antec Grid software helps you monitor and control the Kuhler H2O 950, and allows you to customize its stylish RGB LED.
  • newegg Self-Contained Cooling System The Kuhler H2O 950 comes pre-filled, and never needs refilling or priming.
  • newegg Easy Deployment Easy-bend tubes allow for maximum flexibility in radiator positioning.
  • newegg Universal Compatibility The Kuhler H2O 950 includes a newly designed universal mounting bracket that works with either an Intel or AMD CPU.

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 zero maintenance. The extra large pump circulates coolant through optimized water channels, while easy-bend flexible tubing allows it to be installed in nearly any orientation. The Kuhler H2O 650 comes with a 120mm fan. The fan's motor hubs also work as the coolant pumps, and the flow of the coolant is in direct proportion to the fan speed. So a higher fan speed directly translates to a higher coolant flow. 

  • newegg High Cooling Performance The powerful PWM fan pushes air through directional blades and channels it through the radiator for optimal cooling.
  • newegg Monitoring and Control The integrated firmware automatically adjusts fan speed and changes the RGB LED based on temperature.
  • newegg Self-Contained Cooling System The Kuhler H2O 650 comes pre-filled, and never needs refilling or priming.
  • newegg Easy Deployment Easy-bend tubes allow for maximum flexibility in radiator positioning.
  • newegg Universal Compatibility The Kuhler H2O 650 includes a newly designed universal mounting bracket that works with either an Intel or AMD CPU.


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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  • Thomas P.
  • 4/7/2014 5:13:13 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsThe worst cooler

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

Pros: Large single radiator design that fits great in the rear of the case.

Cons: The Intel adapter brackets are a nightmare to install. The clearance allowed for the cooling plate is so tight that it made a mess of the thermal paste and took two people to install.

Other Thoughts: Stay away from this unit. Try something else.

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

  • Joseph D.
  • 3/1/2014 1:25:35 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

2 out of 5 eggsNot worth it

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

Pros: Simple setup, Keeps itself fairly quiet. It has a light.

Cons: Don't plan on using this with overclock. Going in order Cons are as follows.
1. Installation, Springs on screws too stiff. Had to manually compress with pliers just to get screws to start. Retainer ring mounts for screws do not line up completely with my AMD board. Took at least 30 minutes to install just to the CPU.
2. There is no way to control the fan speed. Fan Speed is completely controlled by firmware. This makes it so fan speed changes are slower than if they were done by motherboard as it has to sense the temperature increase within its own electronics. In this regard the older version of this cooler is better.
3. Fan can never be replaced.
4. Don't plan on overclocking with this cooler. With one step voltage change on my AMD 6300 Temps went above 55C. Fan takes too long to change it's speed to keep up. Cooling at anything near 100% even at stock is disappointing. at Idle temps stay between 38 and 40C

Other Thoughts: Plenty of Air coolers will out perform this model. Many of which are half the price or less. I have never had problems with the 620 model that came before this which lead to me buying this updated model. Overall this was not worth the money to me. It's currently installed and working, but will be replaced.

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

  • Keith S.
  • 2/25/2014 4:27:09 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week

5 out of 5 eggs

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

Pros: I went from a stock cooler to this on my AMD FX-8120 and temps dropped from 60+ C to 38ish C with it overclocked from 3.1GHz to 3.55GHz. I see people complaining it's hard to install, don't know why. It took me no more than 30 mins, granted my case had a hole behind the motherboard and I was able to reuse the stock AMD backplate. Even than, hardest thing is just holding the plate in place and getting the first 2 screws started. Not much they could do to fix that. Fits perfectly in my case and have a second fan installed.

Cons: None so far.

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

  • Ryan W.
  • 2/25/2014 9:23:59 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsGreat Performance, Painful Install

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

Pros: This unit was a replacement for an on again off again glitchy Kuhler 620. Upon first startup, the temperature is already ~20 degrees cooler than the 620 (which was much better than the Intel stock that it replaced). I am around 35-45 degrees on each core now as opposed to 60-70 degrees with the Kuhler 620.
Because this was an upgrade, I didn't have to mess around with the rear mounting bracket, which was quite a headache with my first install.

Cons: Rating was given entirely on performance because a difficult install is worth the advantage. That being said...

Even though this was my 3rd time installing a Kuhler series model, it was still a non-stop fight with my case, motherboard, and the cooling unit. The fan casing is gigantic and I had to use the gap install piece because the radiator wouldn't fit flush against the back of my case (it is obnoxiously big). This caused the fan/radiator to be hovering over the CPU area and made screwing in the bracket quite the chore. I'm surprised that Antec hasn't come up with a more intuitive and easier way to get this thing installed since there is obviously a lot of thought put into the brackets and mounting. Complete replacement took about 45 minutes from shut down to boot.

Other Thoughts: Great product once you get it in the case, but if you know which end of a hammer to use, you shouldn't have too much trouble.

Did you find this review helpful? Yes No

  • Jason M.
  • 2/18/2014 5:55:05 AM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

2 out of 5 eggsHard to install even for a pro

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

Pros: Overall design seems durable.

Cons: This has to be one of the hardest to install coolers I have ever seen. With an Intel board and processor it gives you 3 holes that are practically in the same slot. The posts are not secured so as you go to screw them in you will push them out. Why can't they allow you to attache the retaining ring and back plate before the pump and heat plate. Seems like you should be able to snap it in if they attached it from the bottom instead of the top. But instead you have to install multiple spring loaded screws into non secured posts that are in tiny holes that are separated by the tiniest nubs of plastic.

Other Thoughts: They should have had metal back plates made for each Intel socket or at least made 2 so that the holes could be separated and threaded so that your posts would stay put. I am an enthusiast who is A+ certified and built servers and gaming rigs for years and this one component took me longer to install than the rest of the PC.

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

  • Craig G.
  • 2/14/2014 3:15:25 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week

5 out of 5 eggsgood cooler

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

Pros: light tells yu wen temps get to high

Cons: kind of hard to install, instrustions not that good, could use better detail.

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

  • Anonymous
  • 2/9/2014 6:01:22 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week

5 out of 5 eggsGreat cooler

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

Pros: This cooler completely wrecks the stock amd heat sink. It is much more quiet; when it first starts it is loud for 1-2 seconds but then it's completely silent. Don't know why people are complaining on installing it. This was my very first installation of any cpu cooler and it was pretty simple. It even came with the original amd back plate screws to screw in the water block so you don't have to take your old back plate off, making it a lot easier. Also keeps my cpu cool and has a cool led that changes color depending on the cpu's temp. The parts feel high quality and the tubes were easy to maneuver around. That's all I can think of but it is a great cooler for me, I strongly recommend it, and is also great for smaller cases that can't support large heat sinks.

Cons: None so for everything is working great!

Other Thoughts: I'll be sure to update if anything goes wrong or if something simply changes my opinion but again its great so far.

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

  • Nicholas P.
  • 2/2/2014 2:37:59 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsGood cooling,pain to install

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

Pros: I got this cooler because I was upgrading to a new computer but needed to install something on my old LGA 775 chipset cpu.This is probably one of the only coolers I've seen that can still support it. It still cools well even on my current i5, idling around 21-23 never going beyond 33 degrees celsius even during games.The RGB led lights looks cool and gives you a color coded temperate read out.

Cons: I've read a lot of reviews claiming this is a pain to install and it is.The mounting bracket with the screw threads is the main problem.I needed another set of hands just to install the bracket and trying to install the cooler on the cpu was just difficult. The screw they provide felt like they were cross threading but it wasn't the case because I had to install the same cooler twice with the same screws.This was the first aftermarket cooler I ever install and I feel like I can now install any other one much easier.

Other Thoughts: Would have been cool if it came with a program to change the led color or adjust performance.Sometimes it get loud but's not frequent and not an overall problem.

Did you find this review helpful? Yes No

  • Anonymous
  • 1/18/2014 9:26:40 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsWorks great . gets noisy

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

Pros: Its cool looking design, pretty quiet at low speeds . High quality parts. Keeps cou cool and Easy to install

Cons: My unit may be defective so please take that into account. I say why in other thoughts. Gets very noisy at high fan speeds . Takes up more room then a flat fan and can not replace fan over the counter must contact manufacture for a replacement

If you read the specs and reviews We all know this already so no surprise

Other Thoughts: Using with a 100w processor it worked well and blows the AMD OEM cooler out of the water.

It just not quiet enough for my quiet media pc.

The computer is right next to bed and it is a media center computer . Its on all the time. And this cooler makes to much noise. All my parts are silent including seasonic fan less power supply . The only fan in the computer is for cooling the processor.

I decided to build my own water cooling setup and was able to make it silent and at the same time run twice as cool then this cooler. Using a 3 x 120 radiator setup all in case. Using 12db silent fans they are always running on low and cant hear a thing . At same time cooler and I was able to turn memory up to 2400mhz

But this cooler is easy to install seems great quality and cools very good for its size. Able to run memory at 1866mhz with this cooler.

Just in case you don't know What a cooler processor has to do with running the memory faster. The faster the memory the more heat is produced from the processor since the memory controller Is in the processor thus cooler processor can effect memory speeds with out without the processor at default speeds

One thing bother me the most . They packed a peace of foam into the fan blades to protect them during shipping, ok so the plastic fan blades were bent from the foam and this caused extra vibration and extra noise wile it was running. This could have been avoided and It may have been a keeper if they hadn't done that. Better packing material and or design is needed.

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

  • Nicholas H.
  • 1/6/2014 8:42:14 AM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat Success

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

Pros: Absolutely silent, subtle light, cpu temps down almost 20 degrees with higher OC, couldn't ask for more

Cons: Didn't make me eggs this morning

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

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Item#: N82E16835209078
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