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Compact aluminum-and-copper heatsink with a horizontal 60 mm dual-ball fan, silver fins and black frame

Dynatron

Dynatron K666 60 mm LGA 1156 dual-ball CPU cooler

SKU CH-J900-36T50 MPN K666

A 60 mm dual-ball-bearing PWM cooler with an aluminium-and-copper heatsink for Intel LGA 1156 CPUs, reaching 5000 RPM and 26.45 CFM at full duty cycle

  • Fan size60 mm
  • Supported CPU socketsIntel LGA 1156
  • Bearing design2 Ball
  • Rotational speedAt Duty Cycle 0-20%: 1,600 RPM At Duty Cycle 50%: 2,300 RPM
  • Airflow rateAt Duty Cycle 0-20%: 8.5 CFM At Duty Cycle 50%: 12.2 CFM At
  • Operating noiseAt Duty Cycle 0-20%: 13.8 dBA At Duty Cycle 50%: 21.8 dBA At
  • Quiet operation at low load with 13.8 dBA noise at 20% duty
  • Strong cooling headroom delivering 26.45 CFM airflow at 100% duty
  • Dual-ball bearing fan rated for long service life
  • Compact 64 mm height fits space-constrained LGA 1156 builds
  • PWM 4-pin control enables automatic speed scaling across 1600–5000 RPM

Socket LGA 1156 cooler for legacy Intel builds

The Dynatron K666 is a 60 mm air cooler designed for Intel LGA 1156 processors including Core i3-530, i3-540, i5-650, i5-660, i5-661, i5-670, i5-750, i7-860, i7-870 and Xeon 3400 series. It suits repair work, retro builds or replacement of an original heatsink in compact systems where the mounting holes match. Buyers needing support for newer sockets or higher-TDP chips cannot use this cooler.

PWM fan scales from 13.8 to 38.7 dBA

At the 0-20 % duty cycle the fan runs at 1600 RPM, moving 8.5 CFM at 13.8 dBA. At 50 % duty it reaches 2300 RPM with 12.2 CFM and 21.8 dBA. At full 100 % duty the speed hits 5000 RPM, delivering 26.45 CFM at 38.7 dBA. The 4-pin PWM connector allows the motherboard to adjust speed automatically based on CPU temperature.

Aluminium and copper heatsink with horizontal 60

The heatsink combines aluminium fins with a copper base and measures 90.7 x 85.0 x 64.0 mm, weighing 500 g. The fan mounts horizontally on top in a 60 x 60 x 25 mm frame using dual-ball bearings. Overall cooler height is 64 mm, so clearance above the socket must accommodate that dimension. The horizontal airflow pattern directs exhaust toward nearby motherboard components rather than upward.

How it compares

Measured against everything we stock in CPU Coolers & Heatsink Fans, at today’s prices. Recalculated every night.

Price $26.99
Pricier than about 74% of the 1,559 comparable items (median $19.99).
Fan size 60 mm
Lower than about 60% of the 812 comparable items (median 80 mm).

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Specifications

Product
Brand nameDynatron
Model nameK666
Product typeFan & Heatsinks
Performance
Rotational speedAt Duty Cycle 0-20%: 1,600 RPM
At Duty Cycle 50%: 2,300 RPM
At Duty Cycle 100%: 5,000 RPM
Airflow rateAt Duty Cycle 0-20%: 8.5 CFM
At Duty Cycle 50%: 12.2 CFM
At Duty Cycle 100%: 26.45 CFM
Power
Power input connector4 Pin(PWM)
Size & build
Fan size60 mm
Bearing design2 Ball
Cooler materialAluminum & Copper
Fan mountingHorizontal
Heatsink dimensions90.7 × 85.0 × 64.0 mm
Product weight500 g
Shipping weight0.57 kg
Package size112 × 112 × 94 mm
Compatibility
Supported CPU socketsIntel LGA 1156
CPU cooler height limit64 mm
Environment & compliance
Operating noiseAt Duty Cycle 0-20%: 13.8 dBA
At Duty Cycle 50%: 21.8 dBA
At Duty Cycle 100%: 38.7 dBA

Questions about this item

How do I mount the K666 on an LGA 1156 board, and which step is often missed?

Align the horizontal fan bracket with the socket retention holes, press the push-pins through the motherboard until each clicks, then attach the 4-pin PWM header. The step most often missed is confirming all four pins are fully locked before powering on.

What part of this cooler will need replacement first, and when?

The dual-ball bearing fan is the only moving part. At continuous 100 % duty it spins at 5000 RPM, so expect bearing wear after several years of heavy use; at lower duty cycles the interval extends proportionally.

What thermal limit appears first during a long, full-load test?

At 100 % duty the fan delivers 26.45 CFM at 38.7 dBA. If the CPU heat load exceeds what that airflow can dissipate, the cooler hits its thermal ceiling and temperatures climb despite maximum fan speed.

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