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Item#: N82E16835114104

Dynatron K987 92mm Ball CPU Cooler for Intel LGA Socket 1151 / 1150 / 1155 / 1156

  • At Duty Cycle 0~20%: 900 RPM
  • At Duty Cycle 50%: 1700 RPM
  • At Duty Cycle 100%: 2800 RPM
  • At Duty Cycle 0~20%: 15.1 CFM
  • At Duty Cycle 50%: 30.9 CFM
  • At Duty Cycle 100%: 46.96 CFM
  • Aluminum Radial Fin Heatsink with Copper Inserted

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  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Dynatron K987

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the Dynatron K987

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  • Robert M.
  • 3/6/2016 9:05:08 PM
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsDied after less than a year of use

Pros: Cheap.

Cons: I've used this for less than a year and already it's dying. It makes a loud annoying sound and sometimes stalls out.

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  • Anonymous
  • 1/30/2016 6:37:57 AM

5 out of 5 eggsGood value-for-dollar heatsink/fan for Intel 55-65 W CPUs

Pros: Dynatron's P985, K985, and K987 are all very similar. The blue tops (P985 and K985) have a two-ball fan and the red top (K987) has a one-ball fan. There might be slight differences between the heatsinks, but I cannot see any. Dynatron's website indicates that the blue-label fan has slightly higher airflow versus the red-label fan. Dynatron customer support told me that the fan assemblies could be swapped between the three units, but one would need to be careful not to bend the fins of the aluminum heatsink. At idle, neither the blue nor the red fans make any noise.

Any of the three units could be installed on LGA 775, 115x, or 1366 by using the proper mounts, which consist of a metal piece which screws onto the bottom of the heatsink and one or two pieces which anchor the heatsink onto the motherboard. However, if you bought a model intended for a different socket than the one you have, you'd have to buy the proper mounts from Dynatron, except for K987 which includes mounts for LGA 775, 115x, and 1366.

The bottom of the heatsink exhibits a large copper base. Some of the units come with pre-applied thermal paste and others come with a small tube of it. The latter ones have a clear plastic protector which must be removed. It brought the idle temperature of a 65 W i5 Sandy Bridge CPU down to 25 C and a 95 W i5 Sandy Bridge CPU down to the high 20s. However, while running Intel's IPDT, the 65 W i5 Sandy Bridge CPU rose to 50 C, while the 95 W i5 Sandy Bridge CPU rose to the low 60s. I would not use these heatsinks for gaming, overclocking, or applications where a high-wattage CPU would be stressed on a regular basis.

You will need to remove the motherboard from the case unless your case has a cut-out which allows access to the rear of the board. The metal pieces which anchor the heatsink have a sticky side, but I removed it with thumbnails and Goo-Gone for ultimate flexibility.

Cons: None, for the money.

Other Thoughts: I wish Dynatron would sell mounts for AMD CPUs.

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  • Skylar S.
  • 12/20/2015 10:24:56 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsNoticeable sound from a few feet away

Pros: Keeps it cool
Supports just about all sockets

Cons: Very loud idle, can hear from a few feet away.

Other Thoughts: I will just stick with stock cooler as I will not be overclocking it anyway.

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  • Andrew W.
  • 4/2/2015 9:00:57 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsLittle jewel of a cooler.

Pros: Installed it on a Gigabyte GA-81M-DS2V motherboard, and the cooler is cooling a core i5 4690K, so yes this cooler does fit 1150 socket motherboards.

Installation is very easy especially if you have a cut out in your case for access to back of motherboard. The mounting is also very secure once the screws are tightened up. Plenty of room to work with the cooler on a micro atx motherboard, and it did not interfere with the memory.

At stock clocks, ambient temp of 24 C, and using Prime95 version 266 with small FFT's checked, this cooler topped out at 66 C. I have had a Hyper 212 Evo and a Hyper TX3 installed on this motherboard too, and the Hyper 212 while running Prime was 59 C, and the Hyper TX3 topped out at 70C.

I was surprised by how good the Dynatron keeps the cpu cool, but the most important thing is it keeps the VRM's and mosfets a lot cooler too.

Cons: none

Other Thoughts: If you want to keep your components around the cpu socket cool, then this cooler will get the job done just fine, and keep the cpu temperatures in check, plus it will be mounted very securely.

Ok Dynatron fix your specs. I weighed this cooler on highly accurate postal scales, and the specs are off from what Dynatron lists. Total cooler weight with fan grill is 454 grams. Total weight minus fan grill and the grill screws is 436 grams. My Intel factory stock cooler which is a copper core Foxconn weighs 214 grams.

This is a little jewel of a cooler. A little more than what I wanted to pay, but you do usually get what you pay for.

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  • Douglas B.
  • 1/30/2015 5:59:10 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsRound two

Pros: In my initial review, I had installed this on a very low end Biostar socket 775 MATX motherboard. I said the fan was too loud, and it was. The board had a four pin CPU fan header, and this cooler was plugged in to that header. When I would power on the PC, the fan started off loud, and stayed that way. I searched for a setting in the BIOS regarding temperature controlled fan speed, and found nothing. I decided that the problem was probably in the fan.

Because of other issues, I picked up a used Asus P5K Premium as the basis for my HTPC. I recently decided that I would pull this cooler out and do an experiment. Without going to all of the trouble of installing it, I just hooked the fan up to the CPU fan header and powered it on. The fan was still loud. I checked the BIOS settings, and this time there was a setting for temperature controlled fan speeds. Once I enabled that, the fan on this unit slowed down to a speed at which it was very quiet!

So I'm revising my review. Once I come up with some thin double sided tape, I'll be installing this again, and giving the stock Intel cooler the boot.

Cons: You have to come up with some thin double sided tape for the back plate if you want to swap this from one motherboard to another.

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  • Addison S.
  • 7/28/2014 10:19:00 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsWorks, but so loud

Pros: It's a non-stock LGA 1366 Cooler, those are tough to find nowadays
Uh... it keeps my CPU cool.

Cons: SO LOUD
It's probably because my case has a lot of mesh to help with air flow, but SO LOUD

Other Thoughts: There aren't a lot of options for CPU coolers for older CPU's, but man this thing is loud. However, it gets the job done and it's cooler a computer that has become the secondary/kids computer in the home, so I can't complain too much.

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

  • Greg @.
  • 1/20/2014 12:33:56 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsCu Core; fan speed doesn't "hunt"

Pros: Love the screw type hold downs. Very positive. I do much CPU swapping, so the Intel push-pin type aren't built for that. Cu core and the fan speed doesn't go up & down !
It stays constant.

Cons: This screw type takes a little longer to change out, but the time is always positive instead of having to re-stall the pushpin type to get them ALL seat tightly.

Other Thoughts: I thought my motherboard was why the prior HS/Fan this unit replaced would hunt for the correct fan speed as I would hear it going up & down. That drives me nuts. So it's the better Cu core being more consistent and/or this fan isn't OVER sensitive to the temp changes

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

  • David V.
  • 1/8/2014 2:28:10 PM
  • Ownership: 1 week to 1 month

4 out of 5 eggsworks well

Pros: fit on my existing 1366 backplate. dropped my temps by 20c. very quiet compared with the stock dell cooler

Cons: the included thermal paste seemed cheap--I probably would have been better to use my arctic silver but I couldn't find it and I was impatient.

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  • Roger T.
  • 9/10/2013 12:16:34 PM
  • Ownership: 1 day to 1 week

5 out of 5 eggsgreat but

Pros: great design but I'm not an intel user. this is however a well made heatsink, I just wished Dynatron would come out with a socket FM2 version and I'd buy it in a heartbeat.

Cons: no FM2 mounting hardware.

Other Thoughts: great fan for intel users, just wished they had a AMD version.

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

  • JOHN H.
  • 6/21/2013 7:13:08 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat Replacement Cooler

Pros: Twice the size of the original Intel cooler.
Variety of mounting plates. - NO SNAP PINS
Very Quiet
Cheap price

Cons: Not for serious overclocking.

Other Thoughts: Using 2 - Intel Core 2 Duo E 8600
Intel I7-4770K
Both are performing very well and quiet.

Did you find this review helpful? Yes No

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Item#: N82E16835114104
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