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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
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.
IronEgg
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-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

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Showing 275 of 275 reviews - Clear Filters

  • Corey H.
  • 12/17/2014 11:40:12 AM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsBait & switch

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

Pros: Works fine for AMD 8350 Vishera, but buy TUNIQ|TX-2.

Cons: I selected this make and model for a couple reasons. The rating and the price with the rebate. Well it's been 2 months and if I have not received it by now, they are not sending me one.

I had this same exact thing happen with a video card manufacturer who I have purchased 6 video cards from in my lifetime. Cooler Master and XFX will NEVER see another penny from me again.

This is directed at Cooler Master because I know you read reviews. Don't even try to say that it's a mistake on my part. I am not a stupid and know how to follow a few steps and pop something in the mail.

Manufacturer Response:

Hello Corey H,

We apologize for trouble that you are experiencing with the Seidon 120m. Please note that the rebate takes a minimum of 12 weeks to process. Please contact us so that we can provide you with an update from the rebate house.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

Did you find this review helpful? Yes No

  • Juston D.
  • 12/16/2014 9:20:52 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsSo much noise!

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

Pros: Works great, has kept cpu very cool, planning on overclocking soon.

Cons: The fan that is provided with the radiator is louder than my wife's snoring. No joke this fan is seriously loud, consider replacing it.

Other Thoughts: Great for the money. Even though the fan is loud it works like a champ

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

  • Anonymous
  • 12/14/2014 8:35:01 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGet One

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

Pros: - Rock solid performance
- Very Quiet (not noise-less)
- Easy install with very versatile options for installation

Cons: - Water tubing is crazy stiff

Other Thoughts: The tubing is so stiff that it did present somewhat of a challenge routing things in my m-ITX build. I don't know about stock fan as I put a lower db rated one on from the get go. The pump is really quite and it handles a 95W core at full load with minimal temp change. Haven't messed around with OC'ing this build yet but I have no doubt the cooler will do fine.

Did you find this review helpful? Yes No

  • eric b.
  • 12/10/2014 6:20:09 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsgreat alternative to fans

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

Pros: I find it less noisy then fans
Does the job of two fans

Cons: None so far

Other Thoughts: The only thing i have to complain is the paper instruction are terrible, they are not vrry clear and are missing info like fan direction or that you hsve to plug pump on syst fan and not cpu
Luckely they made a youtube video that is great

Did you find this review helpful? Yes No

  • Stephen R.
  • 12/4/2014 4:55:35 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

2 out of 5 eggsExtremely unimpressed

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

Pros: It works kind of.
Doesn't take up a ton of space in my case.

Cons: Doesn't work very well.
Fan is loud.
Not worth the money.
Can't handle very much of an overclock.

Other Thoughts: Don't waste your time and money on this product. I have an i7 3770k and I can only overclock to 4.4ghz at around 92C. I even added a second fan for push-pull. I'm glad I bought this when it was on sale otherwise I would be pretty angry right now. Especially don't buy this if you plan on overclocking. Next time I'm making a custom loop and skipping this cheap junk.

Manufacturer Response:

Hello Stephen R,

We apologize for the trouble that you are experiencing with the Seidon 120m. I believe I trouble shooted with you on our Cooler Master Forums. Again I apologize that you are not happy with the performance but please understand that is only a 120mm radiator AIO and can only handle so much.

Again for as high of an overclock that you are trying to achieve, I would suggest looking at our Seidon 240m, Nepton 240m, Nepton 280L, or Glacer 240L.

Please let me know if you have any more questions.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

Did you find this review helpful? Yes No

  • Ricardo Z.
  • 11/23/2014 12:27:33 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsit can be better

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

Pros: it's a low noice pump and is cheap

Cons: but i have a noice on the pump.I put off and I put a 812 coolermaster

Manufacturer Response:

Hello ricardo s,

We apologize for the trouble that you are experiencing with the Seidon 120M. The Seidon 120m does come with a 2 year warranty.

Please contact us so that we can get you a replacement.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

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

  • Mark H.
  • 11/22/2014 5:33:36 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGood CPU cooling solution

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

Pros: I picked this up on sale through NewEgg. The main reason why I selected this cooler was to avoid interference issues with the nearby memory slots that I had encountered with air-based CPU cooler. This proves very effective at keeping my i7 cool, and it operates very quietly with only an occasional gurgle from the liquid.

Cons: Not sure this is a con, but you need to read the instructions carefully and take your time installing. The nuts that you install need to be installed with the black "washers" towards the motherboard, and the instructions do not make this clear. Also, in the BIOS settings, you need to make sure the header that is hooked up to the pump is set to full speed. I recommend mounting the radiator and fan to the case first.

Other Thoughts: System configuration: i7-4790K processor, Gigabyte GA-Z97X-UD5H motherboard, Gigabyte GV-N980G1 GAMING-4GD, Corsair Vengeance 8GB (2 x 4GB) DDR3-1600, Samsung 840 EVO 500GB 2.5" SSD, Acer H276HLbmid 27.0" via DVI, Thermaltake Chaser A71 ATX Full Tower case. I don't overclock my CPU. I used Arctic Silver 5 instead of the included thermal compound.

Did you find this review helpful? Yes No

  • Christopher K.
  • 11/18/2014 8:39:09 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsPC able to run

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

Pros: Solved a huge overheating problem in my PC case

Cons: Tubing is a bit short in a full tower case

Other Thoughts: Will be purchasing again

Did you find this review helpful? Yes No

  • Brian K.
  • 11/18/2014 4:30:07 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsExcellent cooler

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

Pros: This cooler has great heat reduction capacity, dropped CPU temps 50*F from older version. Easy install, good instructions. Good value

Cons: none

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

  • Anonymous
  • 11/10/2014 10:38:36 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGreat cooling, take your time with installation.

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

Pros: Cooling is awesome. Idles at 32 Celsius and the hottest I've seen it go is 43 Celsius under 100% load. Crazy! Just for comparison, I've been using the stock Intel cooler since 2008 and I've see temperatures above 85 Celsius all too often while gaming. Very happy with this cooler.

Cons: The installation was a pain. I couldn't get the screws on the retention plate to line up with the standoffs. Took me a little bit of wiggling around to get it right. It was worth the little bit of time I spent into installation, I'm happy with the results either way.

Other Thoughts: I'm happy with it but -1 egg for difficult installation.

Did you find this review helpful? Yes No

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Item#: N82E16835103179
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