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Cooler Master > 
Item#: N82E16835103181

Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

  • 600~2400 RPM (PWM) +/- 10% 19.17 ~ 86.15 CFM +/- 10%
  • Radiator Dim. 273 x 120 x 27 mm (10.7 x 4.7 x 1.1 inch)
  • Fan Dim. 120 x 120 x 25 mm (4.7 x 4.7 x 1 in)
  • Fan Noise 19 ~ 40 dBA
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Learn more about the Cooler Master RL-S24M-24PK-R1

General

Brand
COOLER MASTER
Series
Seidon 240M
Model
RL-S24M-24PK-R1
Type
Liquid Cooling System

Block

Block Compatibility
Intel LGA 2011 / 1366 / 1156 / 1155 / 1150 / 775
AMD Socket FM2 / FM1 / AM3+ / AM3 / AM2+ / AM2

Pump

Pump Noise
<25 dBA

Radiator

Radiator Dim.
273 x 120 x 27 mm (10.7 x 4.7 x 1.1 inch)
Radiator Material
Aluminum

Fan

Fan Dim.
120 x 120 x 25 mm (4.7 x 4.7 x 1 in)
Fan RPM
600~2400 RPM (PWM) +/- 10%
Fan Air Flow
19.17 ~ 86.15 CFM +/- 10%
Fan Noise
19 ~ 40 dBA
Fan Connector
4 Pin

Features

Features
Factory filled with coolant, then sealed and pressure tested - requires zero maintenance for years.

Waterblock made with UltraFine Micro Channel enlarge the contact surface between cold plate and coolant.

Durable and powerful water pump - dissipates heat effectively and maintains temperatures through stable water circulation.

Performance 240mm radiator is designed for handling high wattage overclocked CPU.

Double 120mm PWM fan with a wide RPM range to fine tune and balance fan noise and performance.

Quick Info

Warranty

  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years


Customer Reviews of the Cooler Master RL-S24M-24PK-R1

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Showing 175 of 175 reviews - Clear Filters

  • Axel A.
  • 11/26/2014 12:20:50 AM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsPoor QA - nice otherwise!

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: Flexible mounting options, solid construction, fan isolation gasket, ease of installation in my new CoolerMaster HAF XB chassis!

Cons: Poor Quality Assurance - the baseplate that goes under the motherboard to which everything but the radiator mounts should have four threaded screws - mine came with only 3 threaded screws and the fourth one was smooth - no threading at all. Way to go Cooler Master!

Other Thoughts: Most galling part is having to pay return shipping for the RMA. $15.00 to ship this back when it's so glaring a manufacturing defect. But Caveat Emptor! I've been spoiled by the premier online vendor!

Manufacturer Response:

Hello Axel A,

We apologize for the trouble that you are experiencing with the Seindon 240M. The Seidon 240m does come with a 2 year warranty. Please contact us in the future as we could have sent you a new accessory kit for free.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

Did you find this review helpful? Yes No

  • Christopher A.
  • 11/22/2014 5:06:26 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsCooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: It cools down my AMD FX 8350 OC 5gz from 25c to 35c and full load from 42c to 45c, I could go more but I like to play it safe.

Cons: I had to cut my case to make it fit on my CoolerMaster HAF 912 and I had to put the fans outside my case on top, and the CoolerMaster website shows it is compatible with the case, but fan hits my RAM slots and a Rail from the back of my case, but other than that the cooler works so far.

Other Thoughts: It should of had warranty for all your parts in the computer and not just the cooler.

Did you find this review helpful? Yes No

  • Jordan e.
  • 11/20/2014 10:33:14 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsLiquid cooling whats better?

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: Superb all-in-one sealed CPU cooling system. Mounted perfectly on upper portion of my CM Stryker case. Great quality and accessories along with detailed instructions.

Keeping my Intel i7 4790K 4Ghz processor an amazingly consistent low temp even under heavy load when gaming.

Cons: none

Did you find this review helpful? Yes No

  • Santiago M.
  • 11/15/2014 7:17:04 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsBAD WARRANTY SERVICE! STAY AWAY!

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: Cooled the CPU when it worked.

Cons: Unit died only after a year. I contacted Cooler Master for the warranty claim on 11/07/14 via email with an attachment (i.e. receipt/invoice) and got an initial reply (with ticket no. 00051901) later that day. Sent a follow-up email on 11/12/14 since no Customer Service Professional has contacted me yet. It's been over a week no word from them - how UNprofessional! I use my PC not just for gaming bu for work as well.

Other Thoughts: I regret buying from Cooler Master Technology though I loved some of their products that I owned in the past. I stopped buying ECS products of any kind after encountering an inferior motherboard of theirs coupled with bad warranty service. I'm inclined to do the same with unCOOLER MASTER. What a shame!

Manufacturer Response:

Hello Santiago M,

We apologize for the trouble you are experiencing with the Seidon 240m. Eric, our CM Support representative did respond to your ticket and provided the correct RMA information.

The reason why you did not receive any further response is because you were replying to the "Do not reply" emails that our ticket system sends out. Please make sure you log into CM Fanzone and click your ticket number to submit a reply.

Please contact us if you have any further questions.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

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

  • john b.
  • 11/9/2014 7:26:17 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsSo far So good

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: Have had it installed for a little over a week temps get up to around 36c while gaming which is a tad better then my 212 hyper...I played around oc my cpu amd 8320 got her up to 4.5 ghz and she never crashed so far good.

Cons: Not a con on the cooler but I have a really big NZXT CASE and it was a pain in the but to install on this PHATON CASE had to do some moding to get it mounted will never buy a dented up misalign case from NZXT again!

Other Thoughts: Was worth it and something different until either AMD gets on the ball and makes a faster cpu soon or I jump camps and head over to intel.

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

  • Anonymous
  • 11/8/2014 7:37:57 PM
  • Tech Level: High
  • Ownership: more than 1 year

4 out of 5 eggs

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: This was my first and current cooling system and it has been keeping my AMD 9590 at a low 20 degrees during intense gaming and many other strainius tasks on it.

Cons: when i got this product it had been stripped from the treading and i had to buy thicker screws to put in it and other than that no problems.

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

  • Michael W.
  • 11/1/2014 9:20:07 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsIt's a Beast!!!

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: Keeps my CPU colder than the antarctic!!!

Cons: Kind of big, make sure you have room for it. Don't tighten screws too hard, you'll strip the holes in radiator.

Other Thoughts: I bought this cooler along with the Cooler Master HAF XB EVO, LAN/Test Bench Case to cool a AMD FX8370 8 Core, 4.0Ghz CPU, on a ASUS Sabertooth Motherboard. I'm running the radiator with 4 fans in push/pull mode.
I overclocked the CPU to 4.97Ghz stable, and temps are 30-32c at idle, and under full load running SISandra for a full system benchmark maximum CPU temp reached 52c!!!

Did you find this review helpful? Yes No

  • Travis G.
  • 10/15/2014 12:14:35 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsWorks Well

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: Keeps my 4.7ghz 4670k at 50-60C during gaming, 75-85C under an artificial load like Intel's XTU and Prime95. For an AIO solution, it does a good job.

I set mine up in a push/pull config with 4 fans, two on either sides of the radiator.The fans that come with it are beastly. Both loud and powerful. You can really feel the air being pushed through, and it has - on occasion - sucked an article of clothing up.

Installation wasn't too bad, took me about an hour to figure out how to mount everything because I'm building on a Lian Li Pitstop T60 Bench case which has extremely limited options for mounting anything really.

The CPU heatsink itself is quite heavy, plastic housed with a little white emblem light for a clean, modern look. I was very impressed with the mounting system used, but make sure to tighten screws across from each other to get an even compression on the CPU.

Cons: Like another reviewer mentioned, the hoses are STIFF, really, really stiff.

The Radiator is a bit heavy, make sure to mount it well, careful not to strip out the screws. The metal is pretty soft. I was a little disappointed with the quality of the radiator.

Other Thoughts: I came from a Noctua NH-D14 which is nearly equivalent (cooling performance wise) to many AIO liquid solutions as long as you have adequate airflow. I just didn't have the room for the NH-D14 in the case I am using on my new build.

Considering the heat issues with Generation 4 Intel chips, the cooler does a great job.

Some of my heat spikes may be due to an internal problem with the manufacturing of Gen4 intel processors. Google "intel delidding" for more information.

Did you find this review helpful? Yes No

  • Kristofer R.
  • 10/15/2014 6:39:36 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat cooler for great price, destroys h100i

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: I bought this to replace a defective h100i and could not be happier. It outperforms it in every capacity. I am a full 5 degrees cooler (Celsius), and you can control pump speed. You also do not have compatibility errors with asus suite, nor the awful corsair software. Mounting is easy and well engineered, and there are a few installation videos out there to make up for bad instructions. This thing keeps a nice leash on my haswell 4790k.

Cons: Terrible instructions, awful mounting screws.

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

  • Fred G.
  • 10/12/2014 1:03:49 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsPre Built Water Cooling

This review is from: Cooler Master Seidon 240M – All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

Pros: For my first time water cooling this thing isn't bad, although I won't shoot it completely down considering I'm running an i7-3930K and currently in the act of Folding @ Home which beats the processes of the CPU/GPU down a lot. For something that is constantly running it keeps my temps down at about 59*C - but mind that is at the PCW control of the motherboard controlling the pump, I need to switch it over to the PSU for constant power but oh well.

Cons: It's running slightly hotter than I'd like it to when I'm folding proteins, although it's on a 3930K it still hits about 59*C on light which is running my system at approx. 50-60% and when ran at medium it operates around 69-75*C which I find a bit unsettling. But again this may be due to me running it off the motherboard and not on the PSU, either way still a bit warm for having being a water cooled setup.

Other Thoughts: Overall it's not bad, it's already sealed so there isn't any maintenance to be done and it comes with fans - not bad for just over $100. Also at idle I run about mid 30*C and sometimes, on a warm day, just below 40*C.

Did you find this review helpful? Yes No

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Item#: N82E16835103181
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