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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
BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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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 162 of 162 reviews - Clear Filters

  • Daniel K.
  • 9/21/2014 10:20:52 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggs13 months in, still chills like a Champion

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 i5 3570k under 30c idle, under 50c after over 4 hours of gaming on Ultra with a 4.5Ghz OC.

240mm size makes this easily work for a front, door, or top-mount.

Fan "Y" adapter and CPU/Pump are on separate connections, good for better control.

Cons: Fans *can* be loud, but with a proper fan curve they almost never go high enough to be heard. As with any radiator, a weekly dusting keeps things quiet.

Other Thoughts: As with any closed-loop cooler, I highly recommend mounting the pump with the hoses on the SIDE, not the top or bottom, and mount the radiator (which is effectively the reservoir) HIGHER than the pump. This keeps bubbles from getting caught in the pump, and any filament/residue from settling in the pump. This also stops >25db noise from the ceramic pump bearing.

HAF XM Case
MSI Z77a G45
i5 3570k (normally 2.4Ghz w/3.8Ghz turbo) @4.2Ghz w/4.5Ghz turbo
8Gb Mushkin Redline @2133Mhz (9-11-10-28, I think)
EVGA GeForce GTX 780 Classified (Titan-beater OC)

Did you find this review helpful? Yes No

  • James P.
  • 9/20/2014 6:51:22 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month

2 out of 5 eggsone of the top fans malfuctioned

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

Pros: somewhat not too hard to install. Provide good cooling, running 4.1 Mhz @ around 35-38 Celsius degree.
not too loud ( if you don't get a malfunctioned fan like me)

Cons: kinda expensive , I bought it for $95 bucks at local electronics.
Ok, I bought it for the new computer build. After installation, It was incredibly loud that I couldn't bear it no more. I thought I would have to return it back and go for something else instead. But when I troubleshoot it, I found out that the problem was there was one top fan caused all the loud noises.
I replaced that fan with $14.99 Corsair fan and problem resolved.
Now Cooler master...can I have partial of my money back? so my water cooling turns out to be $115 now ...Maybe I wouldn't have this problem if I went with Corsair or something else at first. Very disappointed with Cooler master this time. Will think twice before buying another cooler master products.

Other Thoughts: I'm happy with my new build now.
Asus Rampage IV extreme black edition.
Intel I 7 4930K
cooler master Seidon 240mm
Cooler master stryker.
Asus GTX 760 x2
Antec 850 V PSU
...

Manufacturer Response:

Hello James P,

We apologize for the trouble that you are having with the Seidon 240M. The Seidon 240M does have a 2 year warranty. Please contact us so we can ship you a replacement fan for free.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

Did you find this review helpful? Yes No

  • Eduardo S.
  • 9/18/2014 6:37:51 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat Cooling System

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

Pros: Great cooling system! Keeps my AMD FX-9370 Vishera 8-Core 4.4GHz and a nice decent temperature. Very quiet as well.

Cons: None so far.

Other Thoughts: Take your time with the installation, make sure you buy a case to support a Liquid Water cooling system.

Did you find this review helpful? Yes No

  • Zac M.
  • 9/11/2014 10:57:46 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGreat Water Cooling Solution

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

Pros: Cooling a AMD Fx 8320 Auto Overclock (3.7ghz) @ 32 C Idle
41 C Underload, Underload for more than 20 minutes Max Temperature @ 46 C.

Works Great, Highly Recommend this for those that want a Great Cooling Solution for Gaming/WorkStation

Cons: After 2 weeks, started to hear a buzzing noise in the radiator, turns out the radiator would keep making this noise unless I turned the fan speed down from max, to about 50-75% fan speed. Should have RMA'd it during the first instance I heard it, but figured I would hold on to it until it gives out, and the temperatures still remain the same, unchanged when under load and when idling, so I guess you could say the quality of it is very good, just annoying to hear the buzzing noise.

Other Thoughts: Great when it works, hasn't overheated any processor that I've tried with it, my current system :

Amd Fx 8320
MSI 990fxa-GD65V2
8GB G-Skill 1600mhz
Sapphire R7 260x OC
Thermaltake 1200watt PSU
Adata SSD 128GB 550/Read 540/Write

Did you find this review helpful? Yes No

  • Christian D.
  • 9/6/2014 9:22:56 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsValue Oriented Two Fan Cooler

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

Pros: Price and value. Simplicity, ease of installation (except for stiff hoses), build quality given the price point.

Cons: Hoses are VERY stiff, and may be installations a bit difficult in very tight quarters or where sharp bends need to be accommodated.

Other Thoughts: The water block, although with a plastic top housing, is relatively heavy, and well put together. The mounting mechanism is elegant, easy to use, and clamps down very tightly. Radiator is a bit on the frugal side of construction, but does the job. Lowered temps 10deg C. coming from my 120M.

Did you find this review helpful? Yes No

  • Cherry p.
  • 9/6/2014 6:39:16 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsl

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

Pros: Easy install, works like a charm. 5 eggs

Cons: none

Did you find this review helpful? Yes No

  • Anonymous
  • 8/31/2014 12:46:39 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsJust a follow up

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

Pros: Still working flawlessly while running 24/7

Cons: None, nada, zip, zero

Did you find this review helpful? Yes No

  • Andrew E.
  • 8/28/2014 10:03:02 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

3 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: Is quiet and cools well.

Cons: After a few days the pump started to make a rattling noise. Just put in for the RMA process. Going to go back to after market heatsink after this short experience.

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

  • Anonymous
  • 8/19/2014 9:19:14 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsSolid

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

Pros: With the discount and rebate I got this for less than most of the high end air coolers on the market. It was a no brainer decision.

Cons: none

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

  • Anonymous
  • 8/18/2014 10:39:03 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsNo complaints at all

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

Pros: I did not have any issues installing this cooler in a HAF 932 cooling an AMD FX-9370 sitting on an ASUS Sabertooth 990FX R2.0 with plenty of room to spare. I left the top 230mm fan mounted as is, mounted the radiator under the fan, then mounted the 2x120mm fans under the radiator. The 230mm is pulling from the radiator and the 2x120mm fans push into the radiator. No issues whatsoever with fan connectors because I researched ahead and purchased a splitter to connect the 2x120mm fans to a single fan header (CPU_FAN) and the water pump has it own header (CPU_OPT). I don't have issues with excess noise. I also run my rig 24/7 since the day it was conceived. The only thing to make sure is using the right screws for mounting the radiator and fans. One set of screws is slightly longer than the others. I used the longer screws to mount the radiator to the top grill, under the 230mm fan. Then the shorter ones to mount the 2x120mm to the bottom of the radiator. The shorter screws will not reach far enough to mount the radiator under the 230mm to the top of the case. The existing holes in the top grill for the optional 120mm fans to replace the 230mm fan line up perfectly.

Cons: None to date. As I stated in the pros section, I run my rig 24/7 with no concerns at all.

4 out of 4 people found this review helpful. Did you? Yes No

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Item#: N82E16835103181
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