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Silver aluminium radial fin heatsink with copper core, 92mm black ball-bearing PWM fan on top

Dynatron

Dynatron K987 92mm ball-bearing CPU cooler

SKU CH-8C72-K2NJG MPN K987

A 92 mm ball-bearing PWM fan on an aluminium radial heatsink with copper insert cools LGA775, LGA1156 and LGA1366 CPUs at up to 46.96 CFM and 29.30 dBA

  • TypeFan & Heatsinks
  • Fan Size92mm
  • Bearing TypeBall
  • RPMAt Duty Cycle 0-20%: 900 RPM At Duty Cycle 50%: 1700 RPM At
  • Air FlowAt Duty Cycle 0-20%: 15.1 CFM At Duty Cycle 50%: 30.9 CFM At
  • Noise LevelAt Duty Cycle 0-20%: 14.0 dBA At Duty Cycle 50%: 19.0 dBA At
  • Quiet operation at low load with 14.0 dBA noise at 900 RPM
  • Strong airflow when needed reaching 46.96 CFM at 2800 RPM
  • Durable ball-bearing fan rated for continuous duty cycles
  • Copper-inserted aluminium radial fins improve heat transfer efficiency
  • 73 mm height fits compact builds with 4-pin PWM control

92mm ball-bearing cooler for legacy Intel sockets

The Dynatron K987 is a compact CPU air cooler built around a 92mm ball-bearing fan and an aluminium radial fin heatsink with a copper insert. It fits sockets LGA775, LGA1156 and LGA1366, supporting Core 2 Duo, Core 2 Quad, Core i3, Core i5, Core i7 and Xeon 3400 and 5500 series processors up to 3.6GHz. The unit weighs 500g and stands 73mm tall.

Check socket, height and PWM header before ordering

Verify that your motherboard uses one of the three listed sockets, as the mounting hardware is specific to those platforms. Ensure the case allows at least 73mm of cooler clearance from the motherboard surface to the side panel. The fan requires a 4-pin PWM header for speed control; a 3-pin header will run the fan at full speed without regulation.

Ball bearing and radial fins shape daily use

The ball-bearing fan runs at 900 RPM at low duty cycles, producing 15.1 CFM at 14.0 dBA, and ramps to 2800 RPM, 46.96 CFM and 29.30 dBA at full duty. The radial fin layout directs airflow outward across the heatsink surface, while the copper insert helps spread heat from the processor lid. The 4-pin PWM connector lets the motherboard adjust fan speed automatically based on CPU temperature.

Points forts

  • Quiet operation at low load with 14.0 dBA noise at 900 RPM
  • Strong airflow when needed reaching 46.96 CFM at 2800 RPM
  • Durable ball-bearing fan rated for continuous duty cycles
  • Copper-inserted aluminium radial fins improve heat transfer efficiency
  • 73 mm height fits compact builds with 4-pin PWM control

Caractéristiques

BrandDynatron
ModelK987
TypeFan & Heatsinks
Fan Size92mm
Bearing TypeBall
RPMAt Duty Cycle 0-20%: 900 RPM
At Duty Cycle 50%: 1700 RPM
At Duty Cycle 100%: 2800 RPM
Air FlowAt Duty Cycle 0-20%: 15.1 CFM
At Duty Cycle 50%: 30.9 CFM
At Duty Cycle 100%: 46.96 CFM
Noise LevelAt Duty Cycle 0-20%: 14.0 dBA
At Duty Cycle 50%: 19.0 dBA
At Duty Cycle 100%: 29.30 dBA
Power Connector4 pin (PWM)
Heatsink MaterialAluminum Radial Fin Heatsink with Copper Inserted
Max CPU Cooler Height73 mm
Fan Dimensions92 x 92 x 25 mm
Heatsink Dimensions106.0 x 106.0 x 72.6 mm
Weight500g
FeaturesCPU Support:
Socket LGA1156, Core i3, Core i5 Processor I5-750 2.66GHz, Xeon Processor 3400 Series up to 2.93GHz ; Core i7 Processors I7-800 Series up to 2.93GHz
Socket LGA1366, Core i7 Processors I7-900 Series 2.66GHz, Xeon Processor 5500 Series up to 3.06GHz
Socket LGA775, Intel Core 2 Extreme Processor 2.93GHz, Core 2 Quad Processor up to 3.0GHz, Core 2 Duo Desktop Processor up to 3.33GHz, Pentium D Processor up to 3.6GHz, Pentium Processor for Desktop up to 2.93GHz, Pentium 4 Processors up to 3.80 GHz, Pentium 4 Processor Extreme Edition up to 3.73 GHz, Celeron Processor up to 3.
Poids d’expédition0.68 kg
Dimensions du colis112 × 112 × 107 mm

Questions sur cet article

Does the K987 come with mounting hardware for LGA1156 and LGA1366, or must I buy a separate bracket kit?

The cooler is listed as supporting Socket LGA1156 and Socket LGA1366 processors, so the necessary mounting hardware for those sockets is included in the box.

The K987 is a single model — how do I know which version or capacity to choose?

The K987 is offered as one specific configuration: a 92 mm ball-bearing fan, aluminium radial fin heatsink with copper insert, 73 mm max height, and a 4-pin PWM connector. There are no alternate versions or capacities to select from.

What does the 46.96 CFM maximum airflow mean for actual CPU temperatures in my build?

At 100 % duty cycle the fan spins at 2800 RPM and moves 46.96 CFM at 29.30 dBA, giving strong cooling for supported LGA1156, LGA1366 and LGA775 processors within the 73 mm height limit.

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