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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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This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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The Seidon 120XL is designed to bring watercooling to the masses. It fits in virtually every case, and is compatible with every available Intel and AMD platform, and as easy to install as a heatsink. It comes factory filled, sealed and tested with a two year zero maintenance guarantee. Thanks to a 120mm PWM fan with a wide RPM range and a thicker radiator with more surface area, Seidon can operate silently or unleash a powerful cooling storm at your command. 

  • newegg Superior performance The durable and powerful water pump helps dissipate heat effectively and maintain temperatures through stable water circulation. The UltraFine Micro channels on the waterblock enlarge the contact surface between cold plate and coolant for more heat transfer. Performance 38mm thick radiator is designed for handling high wattage overclocked CPU. Double 120mm PWM fan provides a wide RPM range to fine tune and balance fan noise and performance.
  • newegg Zero maintenance Factory filled, sealed and tested, the Seidon 120XL requires zero maintenance for years.
  • newegg Universal socket compatibility The Seidon 120XL is compatible with every available Intel and AMD platform.

The Seidon 120V is Cooler Master’s latest compact water cooling kit with the best cost/performance ratio. The water block and 120mm PWM fan work side by side to dissipate heat efficiently. No maintenance is needed for this water cooling solution. It fits in virtually every case, and is compatible with every available Intel and AMD platform

  • newegg Optimized pump and water block The optimized pump and water block provide excellent water flow and system performance. The durable FEP Tubing provides the advantages of nearly no moisture absorption, high thermal stability, and high pressure tolerance.
  • newegg Maximum water contact surface The precision machined micro-channel maximizes the water contact surface for quickly heat dissipation.
  • newegg 120mm PWM fan The water cooler comes with a 120mm PWM fan with a wide RPM range. The fan operates at low RPM when you do everyday computing, and operates at high RPM when you play intense games. Enjoy the best balance between cooling performance and noise level!
  • newegg Universal mounting solution The tool-free universal mounting system is compatible with all available Intel and AMD platforms.
  • newegg Blue LED indicator The blue LED indicator shines brightly when the pump is running properly.
  • newegg Maintenance free The Seidon 120V is factory filled with coolant, then sealed and pressure tested. No maintenance is need for years!

Following the success of the Seidon 120M, COOLER Master introduces an improved CPU water cooler Seidon 240M. It has all the cooling technologies of Seidon 120M applied and has larger radiator up to 240mm. The larger radiator not only sheds more heat but also supports two 120mm fans. The compact design brings it to the masses. Also, the Seidon 240M is designed with zero maintenance and universal CPU socket compatibility.

  • newegg Fantastic cooling performance The durable and powerful water pump helps dissipate heat effectively and maintain temperatures through stable water circulation. The UltraFine Micro channels on the waterblock enlarge the contact surface between cold plate and coolant for more heat transfer. Performance 240mm radiator is designed to dissipate huge heat from overclocked CPU and can accommodate two 120mm PWM fans. The 120mm PWM fan offers a wide RPM range of 600~2400 +/- 10% allowing you to fine tune and balance fan noise and performance.
  • newegg Zero maintenance Factory filled with coolant, then sealed and pressure tested, the COOLER MASTER Seidon 240M requires zero maintenance for years.
  • newegg Universal Socket Compatibility The COOLER MASTER Seidon 240M features universal socket support including Intel LGA2011, 1366, 1156, 1155 and LGA775 as well as AMD FM2, FM1, AM3+, AM3, AM2+, and AM2.



Cooler Master Seidon 120M Liquid CPU Cooler

The Seidon 120M is Cooler Master’s latest, incredibly compact watercooling kit that aims to bring watercooling to the masses. It fits in virtually every case, is compatible with every available Intel and AMD platform, and as easy to install as a heatsink. It comes factory filled, sealed and tested with a two year zero maintenance guarantee. Thanks to a 120mm PWM fan with a wide RPM range Seidon can operate silently or unleash a powerful cooling storm at your command.

UNIQUE FULL COPPER WATERBLOCK DESIGN
Utilizes a micro-channel design to maximize surface contact area to quickly pull heat away from your processor.
SAFE OPERATION INDICATOR LED
A reassuring blue LED indicator light shines brightly when the pump is powered and running properly.
UNIVERSAL MOUNTING SOLUTION
Supports the latest sockets from Intel and AMD

- Intel LGA 2011/1366/1156/1155/1150/775

- AMD Socket FM2/FM1/AM3+/AM3/AM2
MAINTENANCE-FREE SETUP
Guaranteed for maintenance-free operation for years to come without the need to refill coolant.

Technical Specs:

Model RL-S12M-24PK-R1
CPU Socket Intel LGA 2011 / 1366 / 1156 / 1155 / 1150 / 775

AMD Socket FM1 / AM3+ / AM3 / AM2
Main System Dimension Ø 70 x 27mm (Ø 2.75 x 1.1 inch)
Radiator Dimensions 150.3 x 118 x 27mm (5.9 x 4.6 x 1.1 inch)
Radiator Material Aluminum
Fan Dimension 120 x 120 x 25 mm (4.7 x 4.7 x 1 in)
Fan Speed 600~2400 RPM (PWM) ± 10%
Fan Airflow 19.17 ~ 86.15 CFM ± 10%
Fan Air Pressure 0.31 ~ 4.16 mm H2O ± 10%
Fan Life Expectancy 40,000 hours
Fan Noise Level (dB-A) 19 ~ 40 dBA
Fan Bearing Type Rifle bearing
Fan Connector 4-Pin
Fan Rated Voltage 12 VDC
Fan Rated Current 0.3A
Fan Power Consumption 3.6W
Pump Life Expectancy 70,000 hrs
Pump Noise Level 17dBA
Pump Connector 3-Pin
Pump Rated Voltage 12 VDC
Pump Load Current 0.15A
Pump Power Consumption 1.8W
Warranty 2 years
UPC Code 884102018930

 

  • newegg Superior cooling performance The COOLER MASTER RL-S12M-24PK-R1 features a waterblock machined out of a single block of copper for the best possible heat transfer. Precision machined Micro Channels maximize the water contact surface to quickly dissipate heat. Plus, its compact 120mm aluminum radiator fits in virtually any case, internal or external to satisfy various needs.
  • newegg Speed control for low noise Fin design is optimized for minimum air restriction to reduce fan speed and noise. 120mm PWM fan with a wide RPM range fines tune and balances fan noise and performance.


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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  • Steve M.
  • 7/10/2014 11:45:16 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsGrand Canyon heatsink

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

Pros: Quite, thats about it

Cons: This heatsink on this is the least smooth thing I have ever seen in my entire life. It isn't shiny, it looks like the texture of a painted wall. I plan on returning this, I know how to apply thermal paste, and I KNOW that the heatsink shouldn't have a surface that looks this bad. Quite sad I was excited to have my first water cooler. Going to buy Noctura DH-14.

Other Thoughts: Now I get to pay a return fee, awesome.

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

  • Dan S.
  • 7/7/2014 6:10:59 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsInstall wasn't the easiest

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

Pros: Sleek design,
quiet running,
pricing,
keeping the system at a cool 26 degrees

Cons: Install instruction were lacking,
coolant lines are a little short,
was hard to fit, even in a full case

Other Thoughts: I finally had the time to install this.
I have a HAF X full case 942KKN1 and this beast was a pain to install, and barely fit! So if you have a smaller case, I strongly advise to reconsider on this.
Videos on youtube helped, but unless your case matches the ones depicted you're on your own to figure it out.
On my install I had to remove the top 200mm fan in order to get the setup to fit. I used the push configuration.
With the radiator placement positioned the the case's top fan compartment, it was a little stretch for the lines to make it to the CPU.
Also to mount the support bracket I pretty much had to remove the motherboard, since the HAF's window compartment was too small for the bracket to just pop in.

Did you find this review helpful? Yes No

  • William B.
  • 7/2/2014 11:08:49 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsCM Seidon 240M CPU Cooler

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

Pros: I am impressed with the quality and construction of the components of this CPU cooler. It has a massive cooling capacity and my CPU still has not reached 60 Celsius even under enormous overclock testing at full load. It is also nearly silent. Installed easily, even though it does require a large area to install.

Cons: When connecting the metal Seidon CPU block to the metal brackets underneath the motherboard - be sure to use non-conductive washers where the nuts and brackets touch the motherboard surface, as we did encounter an issue with the metal brackets shorting the motherboard and causing issues. Once I installed the washers (not supplied with the Seidon) everything has worked flawlessly.

Other Thoughts: I have notified Cooler Master and my motherboard manufacturer MSI of this issue.

Did you find this review helpful? Yes No

  • Don C.
  • 6/18/2014 10:18:15 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsChill Factor

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

Pros: Install was a breeze and it was a plus to get a gasket with the system to seal the fans to the radiator. No air leaks all air passes throughout the radiator. Therefore the static pressure is good. The fans are silent and set up in the pull configuration. Great cooling system for new system builders. Also it has a super low price for a 240mm cooling solution. Under $100.00 the Antec cooling system will run around $120.00. Works perfect in a Cooler Master LB EVO case.

Cons: Small cooler lines. The Antec uses larger cooling lines and dual pumps. The Cooler Master has only 1 cooling pump so if the pump fails?

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

  • Patrick V.
  • 6/12/2014 4:19:54 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggskeeps it cool, but fans are LOUD!

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

Pros: Very good cooling, simple installation, aesthetically pleasing

Cons: Loud

Did you find this review helpful? Yes No

  • Brian W.
  • 5/31/2014 4:49:18 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsWater pump failure

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

Pros: The fans seem to be of nice quality; it has hardware to mount on most processors, comes with Y adapter for the fans power -- for the newbs, be sure to plug these into the cpu fan header so that the system can adjust the fan speed.

Most of all... It was really quiet....

Cons: ....when it worked as it should. The water pump bearings failed after less than 12 hours of use. If i were forced to be more accurate, I would say it was closer to 4 hours of actual powered on use.

Other Thoughts: I'm going to give a second one a chance, but since i have to re-install the oem brackets for standard air cooling, I'll run the replacement water system for a solid 24 to 48 hours before bothering to go through the annoyance of re-installing this thing plus, for a proper installation I need to cut some sheet metal to create an adapter plate as my case and this unit don't really agree on space requirements.d

Manufacturer Response:

Hello Brian W,

We apologize for the trouble that you are experiencing with the Seidon 240M. The Seidon 240M does comes with a two year warranty. Please contact us so that we can get you a replacement cooler.

Phone: 888-624-5099

Respectfully
Patrick
CMUSA Support

Did you find this review helpful? Yes No

  • Anonymous
  • 5/28/2014 8:26:28 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsA bit disappointed

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

Pros: Price is right and the cooler works well

Cons: minting bracket was malformed and needed sanding to fit, had to drill open one of the holes as well. Case and cooler are the same brand but it fits terribly. Would have asked for a replacement but my customers order was already a week late because the case came in broken, I just didn't have time. This used to be my favorite brand too /sad face

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

  • Ryker T.
  • 5/21/2014 11:53:41 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsLoving it so far!

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

Pros: - Very quiet!
- Very cool
- Sleek and functional
- Pretty easy to set up

Cons: - Instruction manual isn't very detailed
- The screws needed to screw the radiator into the fan mounts are very short. One of them popped back out during assembly. I don't know if removing the rubber grommets in the case will make it loud with the fans attached, but that may be a good idea to try.

Other Thoughts: Like I said, nerve-wrackingly short screws for the radiator. Water cooling is not the thing you want to fall apart in your system.
Other than that, keeps my 4670K cool as a cucumber!

Did you find this review helpful? Yes No

  • John A.
  • 5/19/2014 1:07:27 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

2 out of 5 eggsRattle rattle

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 very cool and was very Quiet until it started making a really loud rattle. See cons.

Cons: Started making a rattle noise off and on after running for just over 24hr's. Since then it has started and stopped 3-4 times. I applied for RMA today and will return it asap. Crossing my fingers for a quick RMA and a working cooler.

Other Thoughts: This is my 2nd cooler. I built a machine for a friend a few months ago and got the same cooler. Install is really easy and straight forward and it gets the job done. I just wish I did not have to worry about defective units. Seems like QA could be better.

Manufacturer Response:

Hello John A,

We apologize for the trouble that you were experiencing with your Seidon 240M. Please contact me directly if you have any questions regarding your RMA.

Phone: 888-624-5099 Ext: 160

Respectfully,
Patrick
CMUSA Support

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

  • Philip C.
  • 5/12/2014 6:43:57 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat Cooler for the Price!

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

Pros: I'm not a computer building genious, but the Seidon 240 does what it is supposed to. I had to cut an opening in my Cooler Master tower to make it work due to the top mounting of the cooler. Runs really quiet and keeps my A10 7700K processor nice and comfy.

Cons: None so far.

Did you find this review helpful? Yes No

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Item#: N82E16835103181
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