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Item#: N82E16835209080

Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

  • Pump Dim. 4.7" x 2.0"
  • Radiator Dim. 11.0" (H) x 4.7" (W) x 1.1" (D)
  • Fan Dim. 120 mm

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Antec KUHLER H2O 1250

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 1250

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  • Anonymous
  • 1/3/2016 12:03:38 AM
  • Ownership: 1 week to 1 month

2 out of 5 eggsSemi-proprietary asetek AIO that has both unimpressive software, and lackluster hardware.

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: Price
It does in fact cool your processor

Cons: Awful controller software
Weird proprietary fan setup
Proprietary cpu bracket ( incompatible with nzxt's kraken g10, for example )
Fans produce wub noise at low speeds, and turn into jet engines at high speeds.
Ugly

Other Thoughts: To warn in advance, I was fortunate to only inherit the item under very inexpensive circumstances. I would NOT recommend this product at the retail price it is.

First look at the item, and it is not attractive in person at all. But my case has no window so it wasn't a huge issue for me. There is more to a cooler than just the appearance though, and this system had produced more and more faults the more time I spent with it.

Mounting was harder than it needed to be. For some reason Antec decided to make their design more unique by having a modified version of the asetek mounts. To explain it in few words, the process requires you to hold the back bracket while installing the cooler on the front. Not the worst thing on the planet unless you aren't building on a table. BUT, the design also moves away even more from aseteks design, as it will lack compatibility with other parts (such as NZXTs Kraken G10. Trust me, it does not fit). Thankfully I did not acquire it for that functionality.

Moving on to the fans, the design seems very restricted in its function, with no obvious option to replace the preinstalled 120mm fans. This is something that I wish I had the option for, because these are really not great fans. They seem suited ok for static pressure, but that's about the best thing I can say about them. When in high-performance mode the system will sound worse than a stock AMD heatsink, and on quiet mode, the fans have a hard time maintaining a constant spin, and produce a slow WUB WHB WUB noise. The last part drove me so crazy I had to turn up my case fans high enough to drown out the noise.

Once the thing is installed, it was smooth sailing from there, but unfortunately the user is stuck using Antec's software, which might be the ugliest interface I have ever seen in my life. There are applications from Windows 95 that are designed better than this. Not only that, but the interface has very few features, especially when put next to NZXTs CAM software (my personal favorite) or even Corsair's software (one that hasn't overly impressed me). The only thing I've seen as an improvement has been the fact that you can enable a setting on the cooler to change the LED color to match your CPU's temperature. This feature seems irrelevant though, as I don't see your CPU varying from 20C to 100C on a regular basis.

That brings me to the question of "does it work?", which the answer is yes. It will maintain my 6 core i7 at an idle of 34 degrees C, and a load of 45 degrees C. So at the very least the cooler is able to do what it set out to do.

That being said, there are much nicer options available for only a small amount of extra cash. The Corsair 240mm goes for about $20 more and is a considerable upgrade (especially in the fan dept), or if your case can accommodate it, the NZXT Kraken X61 is my own personal recommendation.

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  • Dean S.
  • 11/7/2015 8:13:17 AM
  • Ownership: 1 week to 1 month

5 out of 5 eggsTips & Performance Tests: One cool cooler for a new Skylake build.

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: Excellent cooling ability, see below.

Cons: Software could use a read-me file to provide some detail.

Other Thoughts: The Antec Kuhler h2o 1250 water cooler fastened nicely into the preexisting screw holes that hold the upper two fans in the Antec 1100 V2 gaming case. I opted to remove the two case fans and re-position them in other locations in the case. I installed one fan under the CPU (that fastens to the side access panel), and there were still four unused locations to choose from.

My install went smoothly, compared to some reviewers experiences. The mounting system is flexible, giving you the ability to re-use the water cooler should you ever decide to change CPU brands or move to a different socket style. But that brings complications, so here are some tips: Be sure to insert the little rubber bits into the upper mounting bracket (as illustrated in the installation sheet). It keeps the sliders from turning (which gave one reviewer headaches). Using the included adhesive strips keeps the bottom bracket from moving. I jammed a tiny wad of paper in the bracket above each retaining insert head and covered it with a snippet of Scotch Tape. Easily removed, the little plugs helped prevent the inserts from being pushed down during the install. That is probably overkill for experienced builders because I watched a demo-video by one fellow who did not even bother with the adhesive strips. If you are using a new Skylake 1151 socket motherboard, use the middle hole in the plastic mounting bracket for the inserts, and it will fit.

This build uses the ASUS Z170-A, socket 1151 motherboard which has a dedicated water cooler header. I attached the Kuhler to that header instead of the CPU fan header. That allowed me to set the board to Turbo II mode and increase overclocking results for my Intel Core i5-6600K Skylake chip. The motherboards excellent UEFI BIOS optimally overclocked the i5-6600K by 31%. It ramped up the speed from 3.5 GHZ to a whopping 4.6 GHZ and increased the integrated Intel HD Graphics 530 specs by 8% as well.

That alone gave the Antec Kuhler plenty to deal with, but I pushed the chip to its limits. I installed Intel Burn Test v 2.54, which tortures a CPU to see if it will fail. With four open windows on my monitor (the Intel Burn Test, the ASUS BIOS summary, and the Kuhler control and graph screens) I could see what was going on. I also monitored the system with an external watt meter. One reviewer was confused by temperature differences. Be aware that the Kuhler screen is monitoring the liquid coolant temperature, while your BIOS screen will be monitoring your CPU temperature. At low temperatures they are nearly the same, but they diverge as the temperature increases (the CPU being the hotter).

I ran the Burn Test on Standard Mode for 10 iterations. The CPU temperature bounced around from 36 to 67 degrees C as the amount of wattage varied during the tests. The cooling fluid ran about 30 to 32 degrees. When I turned the Kuhler fans from Extreme to Silent mode, the fan RPMs dropped considerably, and temperatures rose two to three degrees C.

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  • Robert S.
  • 10/15/2015 6:57:47 AM
  • Ownership: 1 month to 1 year

2 out of 5 eggsVery Disappointed

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: Very quiet when I lay my Fractal Design Node on it's side, but makes an annoying clicking sound when I set it upright

Cons: Software is absolutely useless even on windows, I run linux so there is no software.

Other Thoughts: I wish I had bought it at New Egg bought it at a brick and mortar no idea where the receipt is and Antec won't honor warranty with out it, but was in a rush to get it because I was on my way home out of the US. Antec also wants me to send it back with out a replacement, no way I can be without CPU cooling for that long.

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  • Cecilia I.
  • 9/27/2015 12:01:10 AM
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsDead after 2 years

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: Worked great at first, around 30-40 degrees celcius

Cons: Very annoying to install, very annoying to remove
Took a bit more force than I was comfortable with to install
Mounting bolts stripped very easily
Died after 2 years, temps shot up to 90c
Fan would sometimes cut out and then spin hard

Other Thoughts: Seriously, the entire method of installing this was just ridiculous. It seems like they tried to come up with the most irritating way to screw the thing on. Screws with springs on them? Whyyyy?! It took me almost 20 minutes to remove the thing for a warranty replacement because the bolts got stuck into the plastic from the torque required to put the silly spring screws in.

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  • Brent H.
  • 8/16/2015 11:05:43 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsAntec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: When it works it works well.. would idle around 27c

Cons: Okay so I've owned this thing for over 6 months now, and I'm having to RMA it a second time.

First of all, while not a big deal the first few days of use you WILL get grease thrown around your case. They must use excess grease on the fans as it will fling it around and it made my White NZXT case look greasy.

Secondly I had to RMA the first one and my current one both for no liquid circulation. Currently mine sounds like a knife getting dragged on concrete when it first starts up, so I'm pretty sure one pump died so bad it's blocking flow

Other Thoughts: When it works it works okay, it can get VERY noisy when going above 1800rpm but that's expected. due to the pumps being located on the fan you'll need a lot of room to work with.

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  • Phillip R.
  • 8/11/2015 10:15:02 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggsGood if on sale.

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: 240 Radiator
2x pumps

Cons: NOT for novice users. The software will not work and the Antec website has errors preventing me from getting any updated version.

Super loud running on the firmware alone.

Can only be run as exhaust so you will need to make sure you can ensure fresh/cool air for the radiator

Other Thoughts: On the plus side my motherboard(x99 deluxe) has a good fan controller so I have bypassed the USB connectivity and plugged the 2x fan/pump combo connectors into it's cpu fan connectors. Runs cool and quiet now. I don't think this is something that could be done with some AIOs that have the pump over the cpu.

On a side note: If you get these on sale it's a bunch of cheap watercooling parts that you can mod into something special if you don't care for warranty.

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  • Michael F.
  • 7/28/2015 6:09:05 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsOkay

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: -Quiet
-Cheap

Cons: -Fans are not removable
-Loud if not configured properly
- 6-7C hotter than corsair h100i when compared using the same cpu and same settings.

Other Thoughts: for 50$ it's the best cpu cooler you will get

Did you find this review helpful? Yes No

  • Gregory B.
  • 7/24/2015 11:29:07 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGreat Visuals

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: I've owned several of these. They draw more heat away from the CPU than anything else I've used including the Corsair H100i which I had to get rid of. The best part of this is the ability to see instantly the processor temperature using the LED.

Cons: The first one I had caused issues with the flexible mount, but they've fixed that with the new design. Also the fans are not swappable.

Other Thoughts: Best closed loop liquid cooler on the market.

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  • Charles M.
  • 5/4/2015 8:13:57 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsWorks but there are issues.

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: Cools really well, easy to install and quiet when it wants to be.

Cons: Noisy fans are an issue with this product. I've had to replace the original one I bought after a couple of weeks of the fans staying noisy. The new one I got from Antec through RMA was nice a quiet for about a week, then the fans started making noise again. I have yet to replace the second one.

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

  • Mike D.
  • 3/29/2015 1:22:36 PM
  • Ownership: 1 day to 1 week

2 out of 5 eggsPumps are loud!

This review is from: Antec KUHLER H2O 1250 Water/Liquid CPU Cooler 240MM

Pros: Cools really well.
LED light on cold plate is slick- colors change based on temp.
Install wasn't as bad as some people say.

Cons: Pumps are super loud. Sounded like an electric razor.
Returning it based on this fact.

Other Thoughts: I bought this from a different retailer, but since I am returning it to them and will be purchasing another brand from Newegg I figured I should let people who might buy this know how my experience was.

I installed this the only way my case would allow, on the top, in the 240mm spot of my case. It went in pretty easily and I was super excited to get cooling. But when I fired it up the first thing I heard was that electric razor sound. A little bit of research later and I discovered that if I turn my case on its side and let some air bubbles work their way out I should be fine. I tried this and it worked....for about 3 hours. The sound came back with a vengeance. Since then I have tried everything to install this in and outside of my case with the exception of the rear position, which I can't do because of my graphics card.

My only options are to return it and find something else or use my computer sideways.

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

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Item#: N82E16835209080
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