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Compact copper heatsink with 70 mm vertical blower fan, matte metal finish

Dynatron

Dynatron R13 CPU cooler 70 mm 2-ball bearing

SKU CH-J3BS-41KJQ MPN R13

A 70 mm dual-ball-bearing blower cooler with copper skived-fin heatsink delivering 14.321 CFM at 6000 RPM and 53.8 dBA maximum noise

  • Fan size70 mm
  • Bearing design2 Ball Bearing
  • Rotational speedAt Duty Cycle 20%: 1,100 RPM At Duty Cycle 50%: 2,600 RPM At
  • Airflow rateAt Duty Cycle 20%: 2.453 CFM At Duty Cycle 50%: 5.798 CFM At
  • Operating noiseAt Duty Cycle 20%: 19.1 dBA At Duty Cycle 50%: 34.2 dBA At D
  • Power input connector4 Pin
  • Quiet cooling at 19.1 dBA on 20% duty cycle
  • Strong airflow reaches 14.321 CFM at full speed
  • Copper skived-fin heatsink conducts heat efficiently
  • 2-ball bearing fan rated for long service life
  • Compact 70 mm footprint fits tight builds

Targeted server cooling

The Dynatron R13 is a compact CPU air cooler built for Intel Sandy Bridge EP and EX processors using the narrow ILM mounting pattern. Its 70 mm fan and copper skived-fin heatsink fit tight server chassis where standard tower coolers cannot be installed.

PWM speed and airflow range

A 4-pin connector lets the motherboard vary the fan between three duty-cycle points. At 20 % the fan runs at 1100 RPM moving 2.453 CFM at 19.1 dBA. At 50 % it reaches 2600 RPM for 5.798 CFM at 34.2 dBA. At 100 % it spins to 6000 RPM delivering 14.321 CFM at 53.8 dBA.

Copper construction and vertical mount

The heatsink uses copper with skived fins measuring 102.0 x 70.0 x 28.0 mm overall, while the fan itself is 70 x 70 x 15 mm. The vertical mounting orientation directs exhaust toward the chassis rear or top panel. Total weight is 0.88 lbs, and the 2-ball bearing is rated for continuous server duty.

How it compares

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

Price $21.99
Pricier than about 60% of the 1,559 comparable items (median $19.99).
Fan size 70 mm
Lower than about 55% of the 812 comparable items (median 80 mm).

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Specifications

Product
Brand nameDynatron
Model nameR13
Product typeFan & Heatsinks
Performance
Rotational speedAt Duty Cycle 20%: 1,100 RPM
At Duty Cycle 50%: 2,600 RPM
At Duty Cycle 100%: 6,000 RPM
Airflow rateAt Duty Cycle 20%: 2.453 CFM
At Duty Cycle 50%: 5.798 CFM
At Duty Cycle 100%: 14.321 CFM
Power
Power input connector4 Pin
Size & build
Fan size70 mm
Bearing design2 Ball Bearing
Cooler materialCopper Heatsink with Skiving Fins
Fan mountingVertical
Heatsink dimensions102.0 × 70.0 × 28.0 mm (Overall)
Product weight0.88 lb (0.4 kg)
Shipping weight0.53 kg
Package size130 × 109 × 61 mm
Environment & compliance
Operating noiseAt Duty Cycle 20%: 19.1 dBA
At Duty Cycle 50%: 34.2 dBA
At Duty Cycle 100%: 53.8 dBA

Questions about this item

How often will the 2-ball bearing fan need replacement?

The dual ball-bearing design is rated for longer continuous operation than sleeve alternatives, so the fan itself should not require scheduled replacement under normal use.

What thermal limit appears first when the cooler runs at 100 % duty cycle?

At 6000 RPM the airflow reaches 14.321 CFM, but the noise rises to 53.8 dBA, making acoustic comfort the practical ceiling before thermal saturation.

How loud and hot does the unit get during all-day operation at 50 % duty?

At 50 % duty the fan spins at 2600 RPM, moves 5.798 CFM and produces 34.2 dBA, a level suitable for continuous background use without excessive heat buildup.

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