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Product Code NH-D9 DX-3647 4U
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Noctua’s DX line CPU coolers have become a default choice in premium grade quiet cooling solutions for Intel Xeon processors. The NH-D9 DX-3647 4U features a larger, custom-designed contact surface and supports both square and narrow type LGA3647 platforms. Based on the proven, 92mm size NH-D9L heatsink and equipped with two of Noctua’s award-winning, PWM controlled NF-A9 92mm fans (high-efficiency 2500rpm version), it combines strong performance with excellent compatibility for 4U systems and other space-restricted applications. Topped off with the professional SecuFirm2™ mounting system and pre-applied NT-H1 thermal compound, the NH-D9 DX-3647 4U forms a complete premium quality package for quietly cooling LGA3647 based Xeon workstations and servers.

Product Details

Notes and warnings  –  Please note that the NH-D9 DX-3647 4U is a dedicated version for the Intel LGA3647 socket. Due to its customised larger base, it cannot be used on any other sockets and is incompatible with Noctua’s standard mounting kits.

Cooler Specification

Cooler Specification

  • Socket compatibility  – Intel Xeon LGA3647
  • Height (without fan)  –  134 mm
  • Width (without fan)  –  95 mm
  • Depth (without fan)  –  95 mm
  • Weight (without fan)  –  584 g
  • Height (with fan)  –  134 mm
  • Width (with fan)  –  95 mm
  • Depth (with fan)  –  120 mm
  • Weight (with fan)  –  769 g
  • Material  –  Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
  • NSPR  –  134
  • Max. TDP  –  see NSPR
  • Fan compatibility  –  140x150x25 (with 120mm mounting holes), 140x140x25 (with 120mm mounting holes), 120x120x25
  • Scope of delivery  –  NF-A9 HS-PWM premium fan, Y-split cable, NT-H1 high-grade thermal compound (pre-applied),  Noctua metal case-badge
  • Warranty  –  6 Years

FAN Specification

  • Model  – 2x Noctua NF-A9 HS-PWM
  • Bearing  –  SSO2
  • Max. rotational speed (+/- 10%)  –  2500 RPM
  • Min. rotational speed (PWM, +/-20%)  –  400 RPM
  • Max. airflow  –  96,3 m³/h
  • Max. acoustical noise  –  30,6 dB(A)
  • Max. acoustical noise with L.N.A.  –  30,6 dB(A)
  • Input power  –  1,68 W
  • Voltage range  –  12 V
  • MTTF  –  > 150.000 h


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