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Dynatron B5 2U+ Active CPU Cooler for LGA3647 Narrow ILM 205W
SKU# AC13423, Model# B5

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SKU # AC13423 | Model # B5

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Dynatron B5 2U+ Active CPU Cooler for LGA3647 Narrow ILM 205W - Socket: FCLGA3647 - 60mm Fan - Max. Air flow 40.60 CFM - Compatible for use with SuperMicro LGA3647 Motherboards (check other manufacturers for compatibility) - 12 Months Limited Warranty

Manufacturer Warranty: 12 Months Limited Warranty
Manufacturer Contact Info: https://www.dynatron.co,

The Dynatron B5 2U+ Active CPU Cooler (B5) is specially designed to deliver sufficient airflow and air pressure for server processors outfitted in motherboards with a narrow Independent Loading Mechanism (ILM) like the LGA3647 CPU socket.  The Dynatron B5 CPU cooler features an aluminium heatsink with an embedded heat pipe and a 60mm fan.  It is a high-quality thermal solution for servers with a 2U and above form factor.

Efficient thermal management

The fan spins at a minimum 1400RPM at a 20% duty cycle and runs up to a maximum 7000RPM at 100% duty cycle.  It produces a top 40.60 CFM airflow and 14.58 mm-H2O air pressure when operating at a full 100% duty cycle.  The fan's 2-ball bearing limits the noise level to a maximum 50dbA.

The Dynatron B5 2U+ Active CPU cooler for LGA3647 Narrow ILM processor socket enables efficient processor cooling for enterprise servers.  Its premium-grade performance comes with a competitive price tag, making it a cost-effective option for professional system builders.


Read more about the Dynatron B5 2U+ Active CPU Cooler on Dynatron's site HERE.

Dynatron B5


Intel® Socket FCLGA3647 Narrow ILM  60x60x25mm PWM Fan, Aluminum heatsink with heatpipe embedded for 2U Server up to CPU power 205 Watts.


CPU Support


CPU Socket



2U Server and Up


108.0 x 80.0 x 66.0 mm


470 g


Aluminum Heatsink with Heatpipe Embedded

Fan Dimension

60 x 60 x 25 mm


At Duty Cycle 20%: 1400 ± 200 RPM
At Duty Cycle 3400 ± 10% RPM
At Duty Cycle 100%: 7000 ± 10% RPM

Rated Voltage



2 Ball Bearing


At Duty Cycle 20%: 0.90 W
At Duty Cycle 50%: 2.04 W
At Duty Cycle 100%: 5.40 W

Air Flow

At Duty Cycle 20%: 8.12 CFM
At Duty Cycle 50%: 20.31 CFM
At Duty Cycle 100%: 40.60 CFM

Noise Level

At Duty Cycle 20%: 16 dBA
At Duty Cycle 50%: 35 dBA
At Duty Cycle 100%: 50 dBA

Air Pressure

At Duty Cycle 20%: 0.58mm-H2O
At Duty Cycle 50%: 3.65 mm-H2O
At Duty Cycle 100%: 14.58 mm-H2O

Lead Wire Pin Out

Lead Wire Pin Out
Pin1- (-)
Pin2- (+)
Pin3- (Techometer/Signal output)
Pin4- (PWM)

Thermal Grease

Shin-Etsu 7762 Pre-printed

SKU # AC13423 | Model # B5

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