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NH-U12S DX-3647, 158mm Height, 205W TDP, Copper/Aluminum CPU Cooler

SKU: 14428174

Manufacturer: NOCTUA

MPN: NH-U12S DX-3647

Availability: Out of Stock


Noctua’s DX line CPU coolers have become a default choice in premium grade quiet cooling solutions for Intel Xeon processors. The NH-U12S DX-3647 features a larger, custom-designed contact surface and supports both square and narrow type LGA3647 platforms. Based on the proven, 120mm size NH-U12S heatsink and equipped with two of Noctua’s award-winning, PWM controlled NF-A12x25 120mm fans, it provides an excellent balance of performance, compatibility and quietness of operation. Topped off with the professional SecuFirm2™ mounting system and pre-applied NT-H1 thermal compound, the NH-U12S DX-3647 forms a complete premium quality package for quietly cooling LGA3647 based Xeon workstations and servers.

  • 5 heatpipes and premium grade 120mm fans for excellent cooling efficiency, slim 120mm size for high compatibility, ideal for quiet workstations in noise sensitive applications (A/V, engineering, etc.)
  • Supports narrow and square type LGA3647 sockets for Intel Xeon Scalable (Platinum, Gold, Silver or Bronze, Skylake-SP/Purley) and Xeon-Phi platforms (Knight’s Landing, Knight’s Mill)
  • Two state-of-the-art NF-A12x25 fans (push/pull dual fan configuration), supporting PWM for automatic speed control through the motherboard: silent at idle, full CFM performance when necessary
  • Pre-applied NT-H1 thermal compound and easy, straightforward installation thanks to SecuFirm2 mounting system and included processor clips
  • Trusted Noctua quality backed up by 6-year manufacturer’s warranty
Cooler Specification
Socket compatibility Intel Xeon LGA3647
Height (without fan) 158 mm
Width (without fan) 125 mm
Depth (without fan) 45 mm
Weight (without fan) 626 g
Height (with fan) 158 mm
Width (with fan) 125 mm
Depth (with fan) 97 mm
Weight (with fan) 1018 g
Material Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
NSPR 157
Max. TDP see NSPR
Fan compatibility 120x120x25
Scope of delivery
  • 2x NF-A12x25 PWM fan
  • 4-pin Y-cable
  • NT-H1 high-grade thermal compound (pre-applied)
  • SecuFirm2™ mounting-kit for LGA3647
  • Noctua metal case-badge
Warranty 6 Years
FAN Specification
Model 2x Noctua NF-A12x25 PWM
Bearing SSO2
Max. rotational speed (+/- 10%) 2000 RPM
Min. rotational speed (PWM, +/-20%) 450 RPM
Max. airflow 102,1 m³/h
Max. acoustical noise 22,6 dB(A)
Input power 1,68 W
Voltage range 12 V
MTTF > 150.000 h