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Silver aluminium heatsink with 80mm fan, 3U form factor

Dynatron

Dynatron W2 CPU cooler Ampere LGA 4926 3U 80mm

SKU CH-DBC5-50WKP MPN W2

3U active air cooler for Ampere LGA 4926 with 80 mm double-ball fan reaching 8000 RPM and 115.61 CFM

  • Fan size80 mm
  • Supported CPU socketsAmpere LGA 4926
  • Bearing designDouble Ball
  • Rotational speedAt Duty Cycle 0 to 20%: 2400 +/- 200 RPM At Duty Cycle 50%:
  • Airflow rateAt Duty Cycle 0 to 20%: 32.52 CFM At Duty Cycle 50%: 67.24 C
  • Operating noiseAt Duty Cycle 0 to 20%: 25.63 dBA At Duty Cycle 50%: 47.85 d
  • Designed for Ampere LGA 4926 processors
  • 80 mm double-ball-bearing fan reaches 8000 RPM at full duty
  • Direct-contact heat-pipe base transfers heat into aluminum fins
  • 3U height of 130.3 mm fits dense server chassis
  • Quiet 25.63 dBA at low duty cycle for noise-sensitive racks

Socket LGA 4926 3U cooler

The Dynatron W2 is an active air cooler built for Ampere Altra processors using the LGA 4926 socket in 3U and taller server chassis. It combines a direct-contact heat-pipe base with aluminium fins and an 80 mm double-ball-bearing fan. The unit measures 130.3 mm tall and weighs 767 g.

80 mm fan performance curve

At a 0 to 20 % duty cycle the fan runs at 2400 RPM, moving 32.52 CFM at 25.63 dBA and 3.45 mm-H2O. At 50 % duty it reaches 4800 RPM, 67.24 CFM, 47.85 dBA and 13.6 mm-H2O. At 100 % duty it spins to 8000 RPM, delivering 115.61 CFM, 64.40 dBA and 38.3 mm-H2O.

No LED or extra accessories

The cooler ships without LED lighting and includes only the heatsink-fan assembly. Builders who need RGB illumination or additional mounting hardware for other socket types must source those separately.

How it compares

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

Price $40.99
Pricier than about 86% of the 1,559 comparable items (median $19.99).
Fan size 80 mm
Typical for this category: the median of 812 items is 80 mm.

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Specifications

Product
Brand nameDynatron
Model nameW2
Product colorSilver
Product typeFan & Heatsinks
Performance
Rotational speedAt Duty Cycle 0 to 20%: 2400 +/- 200 RPM
At Duty Cycle 50%: 4800 +/- 10% RPM
At Duty Cycle 100%: 8000 +/- 10% RPM
Airflow rateAt Duty Cycle 0 to 20%: 32.52 CFM
At Duty Cycle 50%: 67.24 CFM
At Duty Cycle 100%: 115.61 CFM
Static pressureAt Duty Cycle 0 to 20%: 3.45 mm-H2O
At Duty Cycle 50%: 13.6 mm-H2O
At Duty Cycle 100%: 38.3 mm-H2O
Size & build
Fan size80 mm
Bearing designDouble Ball
Cooler materialAluminum + Direct Contact Heat Pipe Heatsink Base + Aluminum Fins
Product weight767(+-10) g
Shipping weight0.91 kg
Package size152 × 127 × 102 mm
Compatibility
Supported CPU socketsAmpere LGA 4926
CPU cooler height limit130.3 mm
Environment & compliance
Operating noiseAt Duty Cycle 0 to 20%: 25.63 dBA
At Duty Cycle 50%: 47.85 dBA
At Duty Cycle 100%: 64.4 dBA
More details
LED lightingNon LED

Questions about this item

What does the 8000 RPM top speed mean for cooling an Ampere Altra processor in a 3U server?

At full duty cycle the fan moves 115.61 CFM with 38.3 mm-H2O static pressure, giving strong airflow through the aluminum fin stack and direct-contact heat pipes for high-density Ampere Altra CPUs.

How does the 4-pin PWM interface control the fan across its 20 to 100 percent duty range?

The double-ball-bearing fan ramps from 2400 RPM at low duty to 8000 RPM at full duty, with airflow scaling from 32.52 to 115.61 CFM and noise rising from 25.63 to 64.40 dBA.

Will the 130.3 mm tall cooler fit in my 3U rackmount chassis with an LGA 4926 socket?

The cooler is 130.3 mm high, 83.6 mm wide and 110.0 mm deep, weighs 767 g, and uses the standard LGA 4926 mounting pattern for Ampere Altra processors.

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