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Square aluminium radial-fin heatsink with copper insert, horizontal 92 mm ball-bearing fan, 73 mm tall

Dynatron

Dynatron K985 92 mm CPU cooler, Intel LGA 1156/1155/1151, ball bearing

SKU CH-Y60Y-7V7H2 MPN K985

A 92 mm PWM cooler with ball-bearing fan and copper-insert aluminium heatsink fits Intel LGA 1156, 1155 and 1151 sockets in a 73 mm height

  • TypeFan & Heatsinks
  • Fan Size92mm
  • CPU Socket CompatibilityIntel LGA 1156 / 1155 / 1151
  • Bearing TypeBall
  • RPMAt Duty Cycle 0-20%: 700 RPM At Duty Cycle 50%: 1400 RPM At
  • Air FlowAt Duty Cycle 0-20%: 14.98 CFM At Duty Cycle 50%: 29.90 CFM
  • Low noise at light loads with 14.70 dBA at 0-20% duty cycle
  • Strong airflow when needed reaching 46.96 CFM at full speed
  • PWM control enables automatic speed adjustment via 4-pin connector
  • Compact 73 mm height fits tight chassis spaces
  • Ball bearing fan built for long service life

Socket compatibility and target use

The Dynatron K985 is a 92 mm air cooler designed for Intel LGA 1156, 1155 and 1151 sockets. It supports Core i3 530 and 540, Core i5 650, 660, 661, 670 and 750, Core i7 860 and 870, plus Xeon 3400 series processors. Builders upgrading or repairing these platforms can use this cooler as a direct replacement.

Thermals noise and power draw

A 4 pin PWM fan runs at 700 RPM and 14.70 dBA at the 0-20 % duty cycle, moving 14.98 CFM. At 50 % duty the speed rises to 1400 RPM, airflow to 29.90 CFM and noise to 18.50 dBA. Full 100 % duty reaches 2500 RPM, 46.96 CFM and 29.85 dBA. The aluminium radial fin heatsink with copper inserted base dissipates heat horizontally within a 73 mm height limit.

Included mounting and software impact

The package provides the mounting hardware required for the listed Intel sockets and the 92 x 92 x 25 mm fan pre-attached to the 106.0 x 106.0 x 72.6 mm heatsink. No additional software, lighting controllers or accessory brackets are supplied. The ball bearing fan and PWM connector work with standard motherboard fan headers without extra configuration.

Points forts

  • Low noise at light loads with 14.70 dBA at 0-20% duty cycle
  • Strong airflow when needed reaching 46.96 CFM at full speed
  • PWM control enables automatic speed adjustment via 4-pin connector
  • Compact 73 mm height fits tight chassis spaces
  • Ball bearing fan built for long service life

Caractéristiques

BrandDynatron
ModelK985
TypeFan & Heatsinks
Fan Size92mm
CPU Socket CompatibilityIntel LGA 1156 / 1155 / 1151
Bearing TypeBall
RPMAt Duty Cycle 0-20%: 700 RPM
At Duty Cycle 50%: 1400 RPM
At Duty Cycle 100%: 2500 RPM
Air FlowAt Duty Cycle 0-20%: 14.98 CFM
At Duty Cycle 50%: 29.90 CFM
At Duty Cycle 100%: 46.96 CFM
Noise LevelAt Duty Cycle 0-20%: 14.70 dBA
At Duty Cycle 50%: 18.50 dBA
At Duty Cycle 100%: 29.85 dBA
Power Connector4 Pin PWM
Heatsink MaterialAluminum Radial Fin Heatsink with Copper Inserted
Fan Mounting Types to HeatsinkHorizontal
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: Intel Core i3 i3-530 & i3-540, Core i5 i5-650, i5-650, i5-660, i5-661 i5-670 & I5-750; Xeon Processor 3400 Series; Core i7 Processors, I7-870 & I7-860
Poids d’expédition0.58 kg
Dimensions du colis117 × 109 × 89 mm

Questions sur cet article

How do I mount the Dynatron K985 on an LGA 1151 socket and which step is often missed?

The cooler uses Intel push-pin brackets for LGA 1156, 1155 and 1151; the step people skip is pushing each pin until it clicks and then twisting the cap to lock it, otherwise the heatsink sits loose and temperatures rise.

What maintenance will the 92 mm ball-bearing fan need over time?

Ball bearings run without lubrication, so the only upkeep is blowing dust from the aluminum radial fins and the 92 x 92 x 25 mm fan blades every few months to keep airflow near the 46.96 CFM maximum.

At what point does the 4-pin PWM fan hit its thermal limit during a long render?

At 100 % duty cycle the fan spins at 2500 RPM and moves 46.96 CFM at 29.85 dBA; beyond that the heatsink cannot shed more heat, so CPU temperatures will climb unless the workload drops.

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