About Scythe

Scythe Co., Ltd. (Registered & incorporated in Tokyo Japan) originally started in Akihabara Electric Town located in Tokyo Japan, where visitors can find the latest electric products from computer parts and accessories to the world’s most advanced cellular phones with video camera capabilities, small displays and the ability to play movies! Scythe Co., Ltd., began its operation and business in November, 2002 as a distributor and manufacture of PC parts & gaming devices for “DIY PC Experts!”. For more information about Scythe Japan HQ, please visit the website at: (If you read Japanese!). Scythe’s first venture was to manufacture a super powerful YET super quiet CPU cooler (Scythe Kamakaze CPU cooler), and with the great success of this Kamakaze CPU cooler, Scythe became recognized as the leading CPU cooler supplier in Japan’s Akihabara Electric Town. Shortly there after, due to popular demand, Scythe began exporting products all over the world.

The Scythe Mugen series which includes Mugen;Mugen 2 ; Mugen 2 Rev.B is well know, Mugen 2 (Rev.B) is probably the most know when it comes to cooling enthusiasts.The Cooler I’m going to test is the new sucessor presented at CeBIT 2011, the Scythe Mugen 3,let’s hope it leaves up to his reputation and gives a excellent performance for the Price.

Specifications and Features

Model Name: Mugen 3 Model No.: SCMG-3000 Manufacturer: Scythe Co., Ltd. Japan Compatibility: Intel®: Sockel 775 Sockel 1155 Sockel 1156 Sockel 1366 AMD®: Sockel AM2 Sockel AM2+ Sockel AM3 Combined Dimensions: 130 x 108 x 158 mm Fan Dimensions: 120 x 120 x 25 mm Fan Speed: 300(+-180)~160rpm(+-10%) Noise level: 9.6~32.15dBA AirFlow: 14.7~88.11 CFM Weight Included Fan: 825 g Accessory:

  • Installation Guide, Thermal Grease
  • Fan-Slip Stream PWM
  • PWM4-pin fan (Model No.:SY1225SL12LM-P)


Package and Contents

The Scythe Mugen 3 comes very well packed with foam protecting the product on both sides. The Mugen 3 comes inside a Scythe tradicional product box which in this case is green and black, it contains lot’s of product infomation. At the front and top of the Mugen 3 product box, there’s image of the cooler and references to his compatibility and some features. Opening the product box you see the Mugen 3 heatsink comes fairly well protected, and that it’s a 6 heatpipe cooler*. The package includes:

  • Scythe Mugen 3 heatsink
  • (1x)120mm PWM fan with 2 mounting clips
  • Thermal compound
  • Mounting kits for Intel LGA775/1155/1156/1366 and AMD AM2/AM2+/AM3 CPU’s
  • Installation manual

Scythe Mugen 3 in Detail

This is how the Cooler looks assembled and ready to install in your system but now I will disassemble it and analyse both the heatsink and fan. The Mugen 3 heatsink has 48 aluminium fins, measures 158mm in height, 130mm in width and 84mm in length and weights about 712g and has dual 120mm fan compatibility.One might say that the heatsink itself is divided by 4 smaller heatsinks which are connected ith each other with 24 fins each of those is passed through with 3 heatpipes,making a total of 6 heatpipes* for the Mugen 3 . *Technically it’s only six heatpipes which are bent in “U” and pass in both sides of the cooler, making the 12 count. At he base the heatpipes are arranged in kind of a unique way, heatpipes which are not nickel plated, but this is expected from Scythe. There’s a smaller heatsink attached to the CPU contact area that should suffice for any other heat that might get through the heatpipes, you should know by now that heat rises in the environment. I think it’s safe to say the CPU contact area comes with a mirror polish finish to it. The included 120mm PWM fan is from the Slip Stream series and can reach speeds of up to 1600RPM while producing a total airflow of 88.11CFM at 32.15dBA of noise, these are the Scythe results, and we don’t know how did they achieve them.

Installation and Tests

The Installation i will try to explain in 3 steps how I installed it

  •  First,get the “3-Metal assembly Clips for LGA 775,1366,1156 and 1155″, and attach to them with the “9-Screw cup for fixing back-plate” and the “10-Fixing Screw Nut for CPU Cooler Clip”.Then using the “5-Screws for metal assembly Clip” attach the Clip to the Cooler (photo 1)
  • The get the “2-Back-Plate” and the “6-Screw for back-plate” and secure the backplate to the motherboard using the “11-Rubber”, take he chance and apply the thermal grease.(photo 2)
  • Gently place the Cooler directly on top of the CPU, and tighten the Screws for backplate to the cooler mounting system.(photo3)
  • You are good to go, mount it up with the rest of your system and enjoy!

Testing Methodology

  • The testing was made with system inside Case with stock fan’s that come with the Antec P193 case and the stock Cooler Fan’s and paste.The room temperature was 25ºC, idle temperatures where taken after 30 min Idling, and load temperatures where taken after 4 hours Prime95 Blend load.
  • Testing will be divided in Default/Overclock settings with PWM/Low/high cooler fan speeds and in idle/load temps.
  • The Load/Idle temperatures recorded where always the highest value recorded in the CPUID HW Monitor. For all the Cooolers the termic paste used was always the stock, has well has the Fan’s, and the same Overclocked settings.
  • Temperature readings are in degrees Celsius(ºC).

Default Settings

To understand these results Notice that:

  • The Lower temperatures you are getting the better, and notice that Load temperatures are by far the most important.
  • Temperatures below 50ºC , we consider to be excelent performance.
  • Temperatures below 60ºC, we consider very good performance.
  • Temperatures below 65ºC, we consider good performance.
  • Temperatures below 70ºC, we consider regular performance.
  • If your Temperatures above 70ºC get a decent cooler, you are probably running a stock cooler of some sort.

Without Overclock the Scythe Mugen 3, idle temperatures are good, but not the best i have seen, the load temperatures are very good, only going slightly above the 50ºC even at Low Speed.

Overclocked Settings

Overclock, and there’s a good surprise Load temperatures even it Low, the 60ºC it’s a very good temperatures result. One thing you might notice is that, the PWM control actually performs better then the High Speed CPU setting(~1ºC)

Noise and Fan Speeds

  • The Rotation per Minute readings where taken using AeroCool Touch 2000 has reader and the Sunbeamtech has fan Controller.
  • The dBA sound pressure has taken with cooler inside the Antec P193.(Side Painel Open)
  • This Cooler Fit’s inside the Antec P193, with side painel closed and the 200mm Fan.

I was very impressed, since the Scythe Yasya fan was noisy in High Speeds, this one from what i recall produces about half the noise,amazing improvement there.


The Scythe Mugen 3 is a good cooler that comes with simple package.Tough I haven’t tested the Mugen 2 Rev.B, I would say that the Mugen 3 has lived up to it’s predecessor name, honestly i wasn’t excepting a great performance difference, because has some of you might know air cooling it’s come to a level where seeing actual performance improvements is becoming harder and harder to achiev. So what’s does this cooler offers:

The Good:

  • Very Good Cooling Performance
  • Scythe Build Quality
  • Dual Fan installation option
  • Support for all recent sockets
  • Price, for this price it will be hard finding something performing better.

The Bad:

  • Mounting system,though I haven’t tested the AMD retention, i didn’t like the final stage how cooler mounting clips get attached to the backplate.

I would like to thank Scythe for providing this sample

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