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Cooler Master > 
Item#: N82E16835103177

Cooler Master GeminII M4 - CPU Cooler with 4 Direct Contact Heatpipes

  • 500 - 1600 RPM (PWM) +/- 10%
  • 17.4 - 58.4 CFM +/- 10%
  • 4 Direct Contact Heat Pipes
  • Aluminum Fins
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Redefining cooling performance for space restricted environments, GeminII M4 is engineered to maximize cooling with its minimal CPU contact gaps and four extremely efficient direct contact heat pipes that provide excellent heat dissipation. Standing at a mere 59mm / 2.3in tall, it is uniquely suited to thrive in the small spaces afforded to CPU coolers in HTPCs and other slim systems.

A unique heat pipe layout is utilized that orients the heat pipes to direct the flow of heat more efficiently to the aluminum fins where the heat is exhausted. Much like the GeminII S524, GeminII M4 features an airflow design that is 90 degree rotated to avoid heat radiating from the motherboard. In turn, this orientation simultaneously provides a steady airflow to motherboard chipsets surrounding the CPU socket.

  • newegg All are for cooling The 4 direct contact heat pipes, in “U-shape” and “C-shape” layout, go through base and aluminum fins for efficient heat conduction and dissipation. Besides that, the newly developed slim fan delivers impressive airflow cooling with up to 58.4 CFM airflow. On top of that, the base is engineered to offer minimal gap between CPU and heatsink to maximize heat transfer to your heatsink.
  • newegg Not only cool CPU Besides voluminous airflow, the included fan delivers 90 degree rotated airflow to avoid heat radiating from the motherboard and cool motherboard chipsets surrounding the CPU socket.
  • newegg For limited space applications GeminII M4 is only 59mm/2.3in in height with fan* attached, perfect for use in HTPC or slim systems. (*the fan is only 15mm thick.)

Learn more about the Cooler Master RR-GMM4-16PK-R2

Quick Info

Warranty

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


Customer Reviews of the Cooler Master RR-GMM4-16PK-R2

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  • Mark W.
  • 2/20/2015 9:41:27 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsKinda Loud

Pros: Low Profile. It will fit into some smaller cases.

Cons: Difficult to install, cooler has cut outs on only one side to access mounting screws, they provide a wrench to access the other side. Fan attachment brackets are flimsy and barely hold the fan in place. Runs too hot for my liking.

Other Thoughts: Not for overclocking obviously. If the install was easier and the fan bracket not so flimsy, I would probably like it. I feel like I wasted $40.

Manufacturer Response:

Hello Mark W,

We apologize for the trouble that you are experiencing with the GeminII M4. Please contact us so that we can assist with the installation.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

Did you find this review helpful? Yes No

  • Zack C.
  • 2/13/2015 8:16:19 AM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

3 out of 5 eggsWill Not Fit 1150 ITX Boards w/ GPU

Pros: Nothing wrong with this cooler - but it is not for use with Socket 1150 ITX Motherboards if you have plans for your PCI-E slot. Maybe my board it just too tight - BIOSTAR B85N 3D. Seems to clear GSkill RAM OK, but it's tight!

120MM CPU coolers are just too big for 1150 ITX in general. My mistake! NewEGG accepted the return, So I replaced with a 92MM Silverstone AR05.

Cons: Part of the learning curve.

Did you find this review helpful? Yes No

  • Anonymous
  • 2/11/2015 8:34:21 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week

3 out of 5 eggsnot sure if this is good....

Pros: everything works as expected
easy install

Cons: I don't think 58-60 degrees idle is a good thing.....

Other Thoughts: not sure if this is a con but in the BIOS, my mini itx Gigabyte F2A88XN motherboard reads idle temps of 58-60 degrees Celsius... my CPU is an AMD Athlon x4 860k

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  • Ian H.
  • 1/26/2015 1:22:01 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsgreat for htpc build

Pros: This keeps my htpc cool and is very quiet. I am using the FX-6300 AM3+ on a micro-atx board. I was a little concerned that the RAM would get in the way, but there is just enough room. It fits comfortably in a cramped htpc case as well.

If you've ever installed an aftermarket cooler before, this is nothing new, but the instructions seem clear enough to me for someone new to this to easily install it without much trouble.

Cons: I was a little disappointed that the actual heat pipes on the bottom have some pretty big gaps between the aluminum and the pipes. I've had heatpipe cpu coolers half this price with a much smoother bottom where its not such a significant gap between the heatpipes. Yes, the thermal paste will fill in the gaps, but metal is a much better conductor of heat than paste, and it would have been nice at this price point to see a better quality job done on ensuring a much smoother bottom.

That being said, it seems to do its job very well and quietly. I opted for this shorter cooler since its going into a htpc build and the cooler I normally depend on my build is much too tall for this application. I think its worth taking off a star just in the fact this model seems to rely too much on using thermal paste and at this price point, I would have expected better build quality.

Other Thoughts: Don't get me wrong, this is a good cpu cooler and a great option for a silent, efficient cooler in tight spaces such as a htpc build. I just wish they had taken a better effort to have a smoother bottom to the cooler so you don't have to use so much thermal paste to make a good contact.

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  • Peter D.
  • 9/19/2014 10:41:34 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsWorse Than AMD Stock Cooler

Pros: Quiet and fits in my Grandia HTPC case...

Cons: The bottom of the heat sink is not at all level or smooth, with large gaps between the heat pipes where thermal paste collects and warm air pockets can form. My CPU was idling hot (70C) and overheating under load, causing the computer to shut off. I tried reapplying the thermal paste and remounting the heat sink, but it didn't help. Why on earth does the bottom of this thing not have a smooth, polished finish like every other CPU cooler I've used?

Other Thoughts: With the stock cooler installed, the A6-3650 APU in my HTPC idles in the low 30s and hits the low 40s under load. How did Cooler Master manage to make something so much worse than a stock cooler?

Manufacturer Response:

Hello Peter D,

We apologize for the trouble that you are experiencing with the GeminII M4. Please contact us for further trouble shooting.

Phone: 888-624-5099

Respectfully,
Patrick
CMUSA Support

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

  • George W.
  • 9/6/2014 2:03:39 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsIn my HTPC

Pros: Cools Great!
Very Quiet!

Cons: None as of yet.

Other Thoughts: This fits perfectly in my low profile Silverstone MILO ML03B HTPC case. Sound is barely noticeable and is used to cool my Socket AM3+ processor.

Did you find this review helpful? Yes No

  • Markeyse M.
  • 9/4/2014 11:41:24 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsKeeps my CPU cool!

Pros: It looks cool! It is big, and seems to keep my CPU around 40°C. Stays quiet.

Cons: I wish there was holes in the fins for the other two screws. Considering I had to take out the CPU a couple of times, taking out the cooler was a pain to deal with on two of the screws.

Other Thoughts: I remember when I had asked Cooler Master for the specs of the unit for fitment with a particular case, they was a month late contacting me. Not soo good customer service there. Good thing the CPU is good.

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

  • Darlene J.
  • 8/14/2014 1:29:47 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWorked Out Great

Pros: Slim, dimensions are precise, quiet, cool, great purchase for it's price. It is a major upgrade from my old cooler. It fit perfect, runs smoother and is so much more quiet It's awesome :)

Cons: None so far!

Did you find this review helpful? Yes No

  • Priscilla C.
  • 7/21/2014 10:53:03 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsmuch better lower temps on amd am3+ processor

Pros: Lower temps. I averaging nice low temps in the 28 to 30 C marks. It normally was in the 42 and 50 C range. This fan and heat sink is great. Just be careful and make sure to install the thermal paste as that really helps with transferring the heat from processor to the massive heat sink.

Cons: Have to remove the motherboard to install. The bracket has to be installed from under side the motherboard. As this is a con for the install, but a pro for the quality of the product. RAM on some motherboards will not fit this heat sink and fan. It did fit on mine, but I know other boards might have trouble clearing ram sockets or if you have very large heat sinks on your ram it might conflict with the space.

Other Thoughts: Price is good, temp is really good. If your unsure of how to take apart a computer this fan might need to be install professionally. As you do need to remove the motherboard in order to mount.

Did you find this review helpful? Yes No

  • Frank S.
  • 7/13/2014 9:26:06 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsQuiet, Fast, Long lasting fan.

Pros: Easy to install bracket is secured by four large nuts. Direct heat pipes. Quiet and long lasting.

Cons: Overhangs memory and key motherboard screws. Only go for this if you have a very hot CPU that is crying out for quiet fan and direct heat pipes.

Other Thoughts: Reduced my core temp on FX 8350 by 5C,. Fast cooling of liquid without the expense. Large fan helps cool north bridge and memory.

Did you find this review helpful? Yes No

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Item#: N82E16835103177
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