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Compact silver aluminium heatsink with embedded heatpipes and a black 60mm PWM fan mounted vertically, narrow ILM screw holes visible

Dynatron

Dynatron B5 CPU Cooler FCLGA3647 60mm PWM 205W

SKU CH-KTQN-9T7JX MPN B5

A 60 mm PWM cooler with an aluminium heatsink and embedded heatpipe, built for Intel FCLGA3647 narrow ILM sockets and rated for 205 W CPUs in 2U servers

  • Fan size60 mm
  • Supported CPU socketsIntel FCLGA 3647
  • Bearing design2 Ball
  • Rotational speedAt Duty Cycle 20%: 1400 +/- 200 RPM At Duty Cycle 3400 +/- 1
  • Airflow rateAt Duty Cycle 20%: 8.12 CFM At Duty Cycle 50%: 20.31 CFM At
  • Operating noiseAt Duty Cycle 20%: 16 dBA At Duty Cycle 50%: 35 dBA At Duty
  • Cools CPUs up to 205 W with aluminum heatsink and embedded heatpipe
  • Fits 2U servers at 66 mm height with 60 mm PWM fan
  • Quiet 16 dBA at low speed via 2-ball bearing
  • Pre-applied Shin-Etsu 7762 grease speeds installation
  • Captive screws secure mounting on FCLGA3647 Narrow ILM

Server-grade cooling for narrow ILM sockets

The Dynatron B5 is an active air cooler built for Intel FCLGA 3647 narrow ILM platforms. It targets 2U server builds that must dissipate up to 205 Watts of CPU heat. The unit combines an aluminum heatsink with an embedded heatpipe and a 60 mm dual-ball-bearing fan. Pre-applied Shin-Etsu 7762 thermal grease and captive mounting screws simplify installation in dense chassis.

Sustained-load behaviour at rated duty cycles

At twenty percent duty the fan spins at 1400 RPM, moving 8.12 CFM at 16 dBA. At fifty percent duty it reaches 3400 RPM for 20.31 CFM at 35 dBA. At one hundred percent duty the fan runs at 7000 RPM, delivering 40.60 CFM while producing 50 dBA. These stepped curves show how acoustic output and airflow scale together under continuous thermal pressure rather than in brief bursts.

Physical limits of the 2U form factor

The cooler stands 66 mm tall, matching the maximum height allowed in a 2U rack profile. The heatsink footprint measures 107.95 by 80.01 mm, while the 6025 fan occupies 60 by 60 by 25 mm. Total mass is 1.03 lbs. The four-pin PWM connector draws 12 V. Builders needing greater airflow or support for wider ILM brackets must select a different thermal solution.

How it compares

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

Price $35.99
Pricier than about 83% 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 nameB5
Product typeFan & Heatsinks
Performance
Rotational speedAt Duty Cycle 20%: 1400 +/- 200 RPM
At Duty Cycle 3400 +/- 10% RPM
At Duty Cycle 100%: 7000 +/- 10% RPM
Airflow rateAt Duty Cycle 20%: 8.12 CFM
At Duty Cycle 50%: 20.31 CFM
At Duty Cycle 100%: 40.6 CFM
Power
Power input connector4 Pin
Size & build
Fan size60 mm
Bearing design2 Ball
Cooler materialAluminum Heatsink with Heatpipe Embedded
Fan mountingVertical
Heatsink dimensions107.95 × 80.01 × 66.04 mm (4.25 in × 3.15 in × 2.6 in)
Product weight1.03 lb (0.47 kg)
Shipping weight0.56 kg
Package size150 × 117 × 102 mm
Compatibility
Supported CPU socketsIntel FCLGA 3647
CPU cooler height limit66 mm
Environment & compliance
Operating noiseAt Duty Cycle 20%: 16 dBA
At Duty Cycle 50%: 35 dBA
At Duty Cycle 100%: 50 dBA

Questions about this item

How loud is the 60 mm PWM fan at full speed during all-day server loads?

At 100 % duty cycle the fan reaches 7000 RPM and produces 50 dBA while moving 40.60 CFM.

Does the cooler include thermal compound or must I supply my own paste?

Shin-Etsu 7762 thermal grease is pre-printed on the heatsink base so no separate paste is required.

Will the 66 mm height and narrow ILM mounting fit my existing 2U chassis and FCLGA3647 motherboard?

The cooler is 66 mm tall, uses captive screws for narrow ILM only, and is designed for active cooling in 2U servers.

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