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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-R2

Quick Info

Warranty

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


Customer Reviews of the Cooler Master RL-S12M-24PK-R2

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  • Ann W.
  • 7/30/2015 10:33:02 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsMore than you may expect

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

Pros: -Very cool, lowered my idle temps (FX-6350) from 35C to ~14C
-Extremely quiet, as long as your ear is more than 3 inches away and you aren't trying to hear it, your golden on sound.
-Rad is extremely small, it can fit in a corner of my little NZXT 210
-It will lower room temperature 1-5*F

Cons: -Tubes are long, will fit in a mid-ATX case but not recommended.
-Tubes are also stiff, they love to be "fun" to get in tight spaces, hence why it's not great for smaller cases as well
-Installation is not too easy.......

Other Thoughts: I bought this only for cooling, i had a loud rig and was very used to sleeping with it, with my head literally by it xD. for 2 days now i keep thinking it went into sleep mode when it's just dead silent. The purpose i bought it for was also well done, i can only get my CPU 4.4GHz stable ( :C ) and under full load for about an hour it sits at 39C almost all the time.

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  • Christopher B.
  • 7/30/2015 2:46:45 AM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsSeriously Cool

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

Pros: I just replaced my six years Arctic Freezer Pro 7(rev 2) for this, and man is there a difference.

I had been trying to overclock my phenom ii 720 BE(I know I like it old school) and kept hitting a wall past 3.4 with the Arctic. That wall was 70c when trying to blow past the 3.4 mark.

Right now I'm running prime 95 with phenom clocked at 3.6ghz and I can't break 45 C.

It's magic for overclocking, that's the truth. It also just looks and sounds so cool. At bootup you'll hear the liquid moving around for a few seconds, granted that's a frightening sound at first. It had me checking for leaks the first few minutes

Cons: It's not an easy installation. You'll definitely need the help of buddy to hold down parts while you turn the screws. It probably doesn't help that I was too lazy to remove my motherboard from its case during installation.

The most tedious part of the installation is probably screwing the fan and radiator to the back of the case. You have the use of 4 long black screws with about a quarter inch of thread at the tip, and those screws go through both the fan and the radiator. One helluva pain, but it holds up at least.

Other Thoughts: I bought this for overclocking and that's what it does best. Install it right by taking your time to screw it down evenly over the cpu and apply thermal paste correctly, and this thing will chill your CPU. On another note make sure you hook up the fan cable on a slot where the mobo can regulate the speed, otherwise it will blow at full 2500 rpm, and it'll sound like a jet engine. Make sure the block connects to the CPU FAN and make sure that it is NOT regulated by the board(NO CPU SMART FAN), you need that thing pushing water consistently.

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

  • mark c.
  • 7/25/2015 1:09:43 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsWorks as advertised

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

Pros: Cools an AMD 8250 just fine. Works as advertised. Will fit almost any case, MB configuration.

Cons: None, Works great

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

  • Sarah S.
  • 7/13/2015 3:09:53 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat cooler

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

Pros: Works, got another fan to help push air through the radiator
Keeps an i5-4670K at 60C with full load at 4.7 GHz
Quiet cooler

Cons: No real issues

Other Thoughts: Can hear the pump sometimes doing pump stuff when all is quiet, but the pump quiets down after whatever it does. I have the pump on 12V constantly. With everything else running while gaming it does not stick out over the dull hum of fans.

The tubes are stiff and like a foot and a half if I remember right. Can be too short. Stiffness not an issue, it's not like they're made of steel, they can be fit into places with some work.

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

  • Anonymous
  • 7/11/2015 6:59:05 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsamazing little unit

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

Pros: This little thing is a champion. I have had it for over 2 years and my 6core never goes above 45 degrees celcius. fit can be tricky due to case manufacturers but that doesnt make it lose an egg. Don't hesitate to buy

Cons: fitting of radiator

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

  • Michael N.
  • 7/3/2015 4:02:09 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

4 out of 5 eggsNew in box failure

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

Pros: I own about 5 of these and haven't had a problem before.

Cons: Opened it to a wet bag holding the radiator.

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

  • Anonymous
  • 6/24/2015 12:39:42 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month

2 out of 5 eggsIt's just meh

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

Pros: it easy to install, mine came with my amd fx 9370 and push/pull fans, and it gets fairly warm with all 8 cores at 4.7ghz (prime 95 torture test) warm like 78C and idle is like 38C

Cons: this is a small radiator, I've read plenty of total failure reviews, and have been monitoring the pump speed and temperatures pretty close especially during load testing, it was free with the processor, going to upgrade this one gets heat soaked too fast and can't release enough heat

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

  • Sam M.
  • 6/23/2015 10:04:45 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGood cooler

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

Pros: This all in one unit makes for easy install. Pump runs quite and steady. Lowered make temps to make OCing a breeze.

Cons: If you do the rebate, prepare for a long agonizing wait.

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

  • Inderjit J.
  • 6/19/2015 6:30:57 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsbest value water cooler

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

Pros: I have an i7 4790k. Works well, my idle temps are crazy: under 27C. Temps at 100% load, after 3 minutes, max cpu temp on each core averaged 59C. And this is with the thermal paste that came with the cooler. It was mostly painless to install using their video on youtube.

Cons: The instruction manual is meh, definitely needs the video as a supplement. But the manual will tell you one or two things that the video doesn't. Neither make it clear how you move the screw pegs on the heatsink (to line up with the motherboad screw holes). You have to pull on them upward and then you can move them. If you just try to move it (like the motherboard backplate pegs), it won't work.

Other Thoughts: After rebate, it's a great deal. Makes your motherboard look really clean and cools equally if not better than any air cooler out there.

Did you find this review helpful? Yes No

  • Andrey P.
  • 5/29/2015 1:07:54 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

1 out of 5 eggsShame on You, Cooler Master.

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

Pros: 1.) Nice cooling - I was at about 35C at idle and around 50C at full load.
2.) Pretty quiet cooler. CPU fan was silent and the pump is barely audible, you would have to listen for it to hear it.*


*Read cons about pump.

Cons: 1.) I ordered this item in November. It is now May 29 and my rebate is nowhere to be found.. -1 Egg
2.) The coolant pipes are very stiff, making installation harder than it needs to be. -1 Egg
3.) My pump makes a noise now from time to time - almost like a scratching noise.. It does not sound very healthy.... I guess it's on the road to failure? -2 Eggs

Other Thoughts: Disappointed in Cooler Master. My pump has not lasted 7 months. Cooler Master let me down on the rebate too. Never got my rebate.

Manufacturer Response:

Hello Andrey P,

We apologize for the trouble that you are experieincing with the Seidon 120m. The Seidon 120m does come with a 2 year warranty so please contact us for a replacement.

Please note that the rebates are processed through a rebate company and do not go directly to Cooler Master. You can check for updates on your rebate by visiting Status-Now.com.

If no updates are provide then please contact Customer Support so we can assist in this matter.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

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

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Item#: N82E16835103179
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