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Item#: N82E16835103180

Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

  • Double Fans, 600 - 2400 RPM (PWM) +/-10% 19.17 - 86.15 CFM +/-10%
  • Radiator Dim. 150 x 120 x 38mm
  • Fan Dim. 120 x 120 x 25mm
  • 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.
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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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.

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!


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.



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-S12X-24PK-R1

General

Brand
COOLER MASTER
Series
Seidon 120XL
Model
RL-S12X-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.
150 x 120 x 38mm
Radiator Material
Aluminum

Fan

Fan Dim.
120 x 120 x 25mm
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
Closed loop design - requires zero maintenance for years.

UltraFine Micro Channel waterblock enlarge the contact surface between cold plate and coolant.

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

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.

Quick Info

Warranty

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


Customer Reviews of the Cooler Master RL-S12X-24PK-R1

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Showing 67 of 67 reviews - Clear Filters

  • Anonymous
  • 7/15/2014 8:56:40 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsawesome great for price

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: I have to say. Keeps system way cooler than a stock fan and quieter. My whole room temp seems cooler as we'll. small and compact

Cons: Hoses not very flexable. Instructions not very clear. Suggest you watch a video

Did you find this review helpful? Yes No

  • Patrick C.
  • 7/1/2014 11:41:27 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsvery good cooling

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: I used all the memory sockets available of my motherboard.
Cooling is good in turbo mode (cpu overclock)
I use an AMD socket AM3. Sound noise is acceptable

Cons: I almost destroyed my computer during installation.
But it is also because the space was limited in my computer case and my "AMD" motherboard was not quite suitable for this installation.

Other Thoughts: Maybe the screws could be stronger.

Did you find this review helpful? Yes No

  • Eric M.
  • 6/30/2014 7:09:12 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGreat cooler

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: Good price
Silent when running at low RPM
PWM capable with the Y adapter
Fit perfectly in a Cooler Master N600 Case
Relatively easy to mount

Cons: Instructions were terrible. It seems to be a trend with Coller Master. However, there are a lot of installation videos on Youtube

Did you find this review helpful? Yes No

  • Roger H.
  • 6/6/2014 10:41:04 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsInconvenient cooler

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: Efficient cooling if it worked

Cons: Mounting screws are too small and thread into dead soft Aluminum. They can be stripped with just two fingers holding the screw driver. I re-threaded them for 8-32 which worked well. When I power it up, it made a loud knocking sound and water started flowing out of the piece attached to the CPU. A second 120mm fan in Push Pull works well.

Other Thoughts: This has the potential of being a good cooler, but needs better material and larger mounting screws.. The radiator top and bottom tanks extend about an 1/8th inch adding to the thickness which prevents using both rear case fans. It does clear out a lot of space over the CPU even with the two pipes . The case fans need about 3/16" apart to use both

Manufacturer Response:

Hello Roger H,

We apologize for the trouble that you are experiencing with the Seidon 120XL. The Seidon 120XL 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

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

  • John W.
  • 5/5/2014 7:33:54 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsOne fan too many for Mini-ITX

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: -Radiators fits like a glove in the Coolermaster Elite 130.
-Hoses are really good length

Cons: -Takes up too much space in a Coolermaster Elite 130 with the puller fan. I'm only using the pusher and have yet to see and spike in temp.
-Stiff hoses, but hopefully they last forever.
-A 45 degree hose angle on the cooler would have been perfect

Other Thoughts: i7-4770 Haswell chip (ITX build)

Did you find this review helpful? Yes No

  • James B.
  • 4/22/2014 7:42:49 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsAwesome cooler

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: Keeps my i7-4820k nice and cool, would probably do so even with a significant Over-clock.

Easy mount brackets, and both fans and the pump have 4-pin connectors and a splitter to plug both fans into one header.

I usually use arctic silver paste but was out, the supplied paste seems to be working just as well.

Cons: none, very adaptable brackets, I installed one on a friends amd FX-8120 a couple of months back and it dropped the cpu temps 30c over the stock heatsink/fan. AMD should follow Intel's lead and not supply a useless cooler with their cpu's.

Other Thoughts: It was purchased for a re-build in tandem with:
ARock x79 Extreme4 Motherboard
i7-4820k Ivory-bridge-E CPU

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

  • Josh K.
  • 4/9/2014 7:30:31 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

2 out of 5 eggsGood but not enough

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: -Cheap when bought on sale
-Works well for the money
-Good for gaming and occasional high performance computing

Cons: -Overheats when maxing processor out for more than 20 minutes.
-Sometimes computer crashes when converting several hours of video overnight using handbrake.
-Screw holes strip easily
-Fans are very loud when maxing processor out and would be put to better use if directly on CPU.

Manufacturer Response:

Dear Customer,

We are sorry to hear you had trouble with our cooler. We would like to get more details as to the settings for the cooler's pump as well as the processor and processor settings you have so we can help troubleshoot the problem and find a solution. Would you be able to contact us so we can accomplish that and rectify the situation?

Respectfully,


Marvin R.
CMUSA Support.

Phone:
1-888-624-5099

Live Chat:
http://us.coolermaster.com/livehelp/chat.php

Ticket:
http://support.coolermaster.com

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

  • John V.
  • 3/25/2014 1:49:35 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsDISAPPOINTED

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: Quiet (when provided with the steady 12 volts)
Less expensive than a full water-cooling system
Relatively easy to mount
Keeps my CPU cool (37C, on average)

Cons: Considering the pump acts up if it doesn't get the steady 12v, it should have come with a molex adapter. I had to buy one online.
I knew about this before I bought it, but what I didn't see was the reviews warning about how easy it is to strip the screw holes. I lost two the first day, not from carelessness, but just from mounting and removing the fan repeatedly while trying to eliminate the rattle.
Since I got the rebate with it, I no longer have the UPC, and I'm betting Newegg won't take it back. Even if they did, I don't like the idea of my computer being dead for a month.
So now I need to find some sort of solution. Perhaps the hardware store has some small nuts I can solder into the worn-out mounting holes.

Other Thoughts: Given that it's cheaper than a full-on liquid-cooling system, and it keeps my CPU relatively cool, I'd say it's mostly worth the money.
However, with the problems I've had, and seeing the problems other people have had, I don't think it's worth $90. $70 is acceptable. I just wish the rebate process hadn't taken three months.

Did you find this review helpful? Yes No

  • Robert L.
  • 3/9/2014 12:43:54 AM
  • Tech Level: Average
  • Ownership: less than 1 day
  • Verified Owner

3 out of 5 eggswhisky powered

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: easy to use
ready to go
no mess

Cons: came bet so only 2 of the 4 mounting screws lined up but with the help of a wooden block and a bottle of whisky it went in just fine

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

  • Amanda S.
  • 3/8/2014 5:20:37 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsWhat in the world has happened???

This review is from: Cooler Master Seidon 120XL – Push-Pull CPU Liquid Water Cooling System with 120mm Radiator and 2 Fans

Pros: Works good when it works.

Cons: I have had this thing for less than a year, purchased 5/19/2013, and for the past 2 weeks, the pump has begun clanking and is no longer keeping my cpu cool like it used to. Not to mention the advertisement below the specs states "Guaranteed no maintenance for years". I would not recommend this to anyone looking for a long term cooling solution. Definitely think I may be buying from Corsair if I can't get any help from CM.

Other Thoughts: DON'T BUY!!!

Manufacturer Response:

Dear Valued Customer,

We apologize for the trouble you are experiencing with the Seidon 120m. 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

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Item#: N82E16835103180
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