Skip to: |

Newegg.com - A great place to buy computers, computer parts, electronics, software, accessories, and DVDs online. With great prices, fast shipping, and top-rated customer service - once you know, you Newegg.

If you are reading this message, Please click this link to reload this page.(Do not use your browser's "Refresh" button). Please email us if you're running the latest version of your browser and you still see this message.

Newegg.com - Computer Parts, Laptops, Electronics, HDTVs, Digital Cameras and More!

Limited Time Only! Newegg Premier is now only $29.99/year. Sign up now.
  • Shipping Destination: United States
  • Wish List
  • Feedback
  • Help
Search all
Search
Home
Home > 
Computer Hardware > 
Fans & PC Cooling > 
Water / Liquid Cooling > 
Cooler Master > 
Item#: N82E16835103179

Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

  • 600~2400 RPM (PWM) +/- 10% 19.17 ~ 86.15 CFM +/- 10%
  • Radiator Dim. 150.3 x 118 x 27mm (5.9 x 4.6 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
IronEgg
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.
BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
  • Pin It
  • Email this page
ICON Loading...



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.


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.

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!


Learn more about the Cooler Master RL-S12M-24PK-R1

General

Brand
COOLER MASTER
Series
Seidon 120M
Model
RL-S12M-24PK-R1
Type
Liquid Cooling System

Block

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

Pump

Pump Noise
17 dBA

Radiator

Radiator Dim.
150.3 x 118 x 27mm (5.9 x 4.6 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.

Compact and durable all in one waterblock secured with 12 stainless steel bolts.

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.

Compact 120mm aluminum radiator fits in virtually any case, internal or external.

Fin design optimized for minimum air restriction to reduce fan speed and noise

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-S12M-24PK-R1

Do you own this product? Write a Review

ICON Loading...

Filter Results

Go

Showing 244 of 244 reviews - Clear Filters

  • Breen H.
  • 7/25/2014 9:04:29 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsGreat until it failed

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: When idle or doing normal "light use", the pump and fan combo were silent. At full speed (all cores doing a parallel compile) it would occasionally be loud enough to be heard. Perfect.

Cons: It's been less than 90 days since building this system. This morning the pump started making a noise that sounds like a failing bearing. It's getting louder by the hour. I don't think it will last the day.

Manufacturer Response:

Hello Breen H,

We apologize for the trouble that you are experiencing with the Seidon 120M. The Seidon 120m does have a 2 year warranty so we can replace the cooler for you.

Please contact us by Phone or Live Chat.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

Did you find this review helpful? Yes No

  • Suraj R.
  • 7/15/2014 11:48:21 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWorks just as advertised!

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: Really brings down core temperature. I have a mini-ITX rig that's packed and I've never had temperatures higher than 46 degrees celcius. And that says something - even when I was playing Crysis 3. They even provide some thermal compound that works almost as well as arctic silver. So, you don't have to buy your own.

Cons: It takes a little effort to install. You'll have to fight with the two protected tubes when you're installing the cooler in a small space that requires the tubing to bend. Easily overcome though

Other Thoughts: Just take your time getting the mounting brackets right. Also, if you have a small mini-ITX rig like I do, spend time planning your layout. The tubing often gets in the way of things.

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

  • James K.
  • 7/8/2014 9:05:37 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggs

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: Quiet, very efficient, excellent for the price.

Cons: A little bulky, and it required a LOT of force to install on an AMD setup.

Other Thoughts: Brought my CPU temp down about 20 degrees (in Celsius) compared to air cooling. Now I'm idling just a degree or two above room temperature and nothing has been able to push it above 45.

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

  • James R.
  • 7/4/2014 2:40:43 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsCooler Master Seidon 120M

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: Easy install, took about 10 mins from start to finish. Keeps my 4790k about 23c-26c under normal use and around 60-70 while gaming. No OC yet other then the turbo boost to 4.4.

Cons: none

Did you find this review helpful? Yes No

  • angela w.
  • 6/11/2014 10:32:57 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week

5 out of 5 eggsLove this thing

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: I was a bit scared, after reading other reviews of this product, and people saying how thin the radiator is, but I am impressed! My CPU on idle does about 5 degrees Celsius!
I'm running the FX8350, with a very light overclock, but I still think that is amazing.
This probably won't apply to many people but, I was able to jam this on the front of my antec 900 as intake so I didn't mess up my airflow of my case.

Cons: The radiator is really, and I know because of that it has its limitations, but I mean, I got his thing for under $50. I'm okay with it

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

  • Stanley F.
  • 6/6/2014 10:40:34 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsBetter Than Expected

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: While playing WoW, my CPU barely breaks past 100 F. My average room temp is 75 F. Do the math, only 25 degrees warmer. At this price break, and seeing how well this performs, I will always go with Liquid Water cooling for all future builds. My Video card is running cooler also!

Cons: I just wish there was a way to know the water is moving. But adding a flow sensor would add to the cost.

Other Thoughts: Wish I had switched to water cooling sooner.

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

  • Daniel W.
  • 6/3/2014 12:07:18 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsMIxed Bag

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: Quiet, cools well

Cons: Installation issues possible

Other Thoughts: The "coating" on the bottom of the standoffs for the base of the unit are insufficient to protect your MOBO. The rough burred edges of the standoffs tore up the surface of my Mobo when tightened up and could have shorted out the traces beneath. I did a hack job on an old rubber inner tube and used it to make better rings for the bottom of the standoffs. Could have ground them down some, too. Do not overtighten

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

  • Tara T.
  • 6/1/2014 1:19:14 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsEasy install and quiet

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: No assembly, easy install, does the job.

Cons: None so far.

Other Thoughts: This was my first foray into water-cooling, but I knew I'd need extra cooling for my FX-8350. Installation was easy as a CPU air cooler. Just attach the pump to the mobo, then mount the radiator/fan to the inside of my case (Antec 900) and you're ready to go! Some complaints have been about hose stiffness, but they just seemed like solid hoses. Temps have been in the 35C to low 40sC range and my system is quieter than the 120mm fan it replaced.

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

  • Brandon C.
  • 5/29/2014 6:15:14 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsMy first water cooler... Wow!

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: Straight forward install instructions. Running temps of around 40c. Super quiet fan. The included thermal paste works. No need to buy other.

Cons: The only Con I could write is that the radiator was a little tough to fit into my tower. However, the tower is almost 7 years old so I suppose it is understandable.

Other Thoughts: I have been weary of buying liquid cooled because of the Horror stories I have heard of. I will say I left the case open for the first week after I installed, just to make sure that the unit would not leak. After almost three weeks of running my AMD 8350, I can say that my CPU temp, as I write this, according to CPUID HW Monitor is between 7 and 15c. very nice for the price.

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

  • Justin R.
  • 5/24/2014 4:42:07 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsNice AIO cooler

This review is from: Cooler Master Seidon 120M – All-In-One CPU Liquid Water Cooling System with 120mm Radiator and Fan

Pros: Simple, maintenance free
Alternative to bulky air coolers
Reasonably quiet with included fan
Easy to install

Cons: Limited routing options
Relatively stiff tubing
Included mounting hardware for radiator and fan not long enough to accommodate noise dampening bushings.

Other Thoughts: To be frank, I bought this because there was a killer deal on it with a significant rebate attached. At the retail price, this unit's performance is inferior an equally priced air cooler. It was a little difficult to maneuver into place, and I felt iffy about bending the tubes to a certain degree for fear of stressing and breaking them. I had difficulty mounting this in the top radiator slot of my Corsair 500R because the noise reducing bushings included in the cases's fan mounts addded too much thickness to properly mount this radiator and fan with ease. I was able to get it mounted, but had to remove the bushings, and even then there wasn't a lot of thread to grab in the radiator.

It performs adequately with stock clocks under load, you're not going to be setting OC records with something like this. That being said, though, it does precisely what it was intended to do. For me, it isn't worth the retail price when there are far better air cooling options at similar (and even lower) price points.

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

Compare Offers from All Sellers

Seller Name & Rating Offer Details  
ICON Loading...

More Buying Options

Are you an E-Blast Insider? Subscribe Newegg e-Blast
PayPal
Shop without retyping payment details. Secure shopping made faster.
Check out with PayPal.

Home
Home > 
Computer Hardware > 
Fans & PC Cooling > 
Water / Liquid Cooling > 
Cooler Master > 
Item#: N82E16835103179
Related Products
Case cooling is becoming more essential these days. ...
R4 series fans offer a unity of maximum ...
The Nepton 280L brings watercooling to the next ...
Case cooling is becoming more essential these days. ...
Shop by Region: United States | Canada | China
VeriSign Click for the BBB Business Review of this Computers - Supplies & Parts in Whittier CAThis site protected by Trustwave's Trusted Commerce program Inc500
Policy & Agreement | Privacy Policy  © 2000-2014 Newegg Inc.  All rights reserved.
If the Adobe Reader does not appear when you click on a link for a PDF file, you can download Adobe Reader from the Adobe web site. nassau