Site updated: 23.4.19

Create service

Create service (19th December 2018 via Trustpilot)
NH-U12DX i4 High Performance Intel Xeon CPU Cooler
24 in stock
(6 customer ratings)
NH-U9DX i4 High Performance Intel Xeon CPU Cooler
Only 3 left in stock, 12 more due in 2 days
(6 customer ratings)

NH-U9/U12DX i4 High Performance Intel Xeon CPU Coolers

The new NH-U9DX i4 and the larger NH-U12DX i4 are both premium quality CPU coolers which have been designed specifically for quietly cooling Xeon based workstations and servers.


  1. PWM support and Low-Noise Adaptor
  2. SecuFirm2 mounting system
  3. 4U Compatibility
  4. 6 years warranty
  5. Anti-vibration pads and fan-clips for second fan *
  6. Anti-vibration pads and fan-clips for second †
  • *NH-U12DX i4 only
  • NH-U9DX i4 only

Noctua's DX line of coolers has become the default choice in high performance quiet cooling solutions for Intel Xeon CPUs. The latest i4 revisions supports LGA2066, LGA2011 (both Square ILM and Narrow ILM), LGA1356 and LGA1366 based Xeon platforms.

The larger of the two coolers, the NH-U12DX i4 comes equipped with Noctua’s award-winning NF-F12 focused flow PWM fan for automatic speed control while the smaller NH-U9DX i4 is supplied with two NF-B9 92mm PWM Fans in a push-pull configuration for ultimate performance.

Due to its slim design, the NH-U12DX i4 now provides easy access to the memory slots and better compatibility with tall modules. Both coolers are fitted with the professional SecuFirm2™ mounting system and are bundled with Noctua's industrial-grade NT-H1 thermal compound making the NH-U9DX and NH-U12DX complete premium quality coolers for quietly cooling Xeon based workstations and servers.

Award-winning NH-U9/U12DX Series

The NH-U9/U12DX i4 is based on the latest version of Noctua’s award-winning NH-U9/12 coolers. First introduced in 2005, the NH-U series have become a standard choice for premium quality quiet CPU coolers and have won more than 400 awards and recommendations from leading international hardware websites and magazines.

Easier access to RAM

Thanks to its slim design with only 45mm fin depth, the NH-U12DX i4 ensures easy access to the RAM slots. When installed parallel to the slots, it will not overhang the memory on LGA1356, LGA1366, LGA2066 and LGA2011 Square ILM even with two fans installed, thus providing full compatibility with tall RAM heatsinks.

High quality Noctua Fans

Recommended by more than 150 hardware publications and thousands of enthusiasts world-wide, Noctua’s premium quality NF-F12 Focused Flow 120mm PWM fan supplied with the NH-U12DX is renowned to combine superb static pressure, excellent heatsink performance and surprising quietness of operation.

The NH-U9DX is supplied with two NF-B9 92mm PWM Fans in a push-pull configuration and features Noctua’s renowned SSO bearing as well as advanced aerodynamic optimisations such as Bevelled Blade Tips and Vortex-Control Notches in order to achieve its superb quiet cooling capability.

PWM Support and Low-Noise Adaptor

The NF-F12 120mm fan supplied with the NH-U12DX i4 supports PWM for convenient automatic speed control through the motherboard. In addition, the maximum fan speed can be reduced from 1500 to 1200 rpm using the supplied Low-Noise Adaptor for even quieter operation.

The NF-B9 92mm fans supplied with the NH-U9DX i4 also support PWM for convenient automatic speed control through the motherboard and by using the low-noise adapter, the maximum fan speed can be reduced from 1600 to 1300 rpm.

NT-H1 Thermal Compound

Having received more than 100 awards and recommendations from hardware journalists around the world, Noctua’s NT-H1 is a proven professional grade TIM solution that provides minimum thermal resistance, excellent ease of use and outstanding reliability.

NH-U12DX - Anti-vibration pads and fan-clips for a second (optional) NF-F12 fan

For users who want to achieve even better performance, a second, optional NF-F12 fan can be used to create a push/pull configuration on the NH-U12DX and the package includes extra fan clips and an extra set of custom-designed anti-vibration pads that allow the rear fan to off-set by 5mm to improve acoustics in dual-fan mode.

SecuFirm2™ Mounting System

Noctua’s SecuFirm2™ mounting systems have become synonymous with quality, safety and ease of use. Supporting Intel’s LGA2011 (both Square and Narrow ILM), LGA1356 and LGA1366 Xeon platforms, the SecuFirm2™ mounting included with both coolers guarantees perfect contact pressure and maximum convenience on all sockets.

6 Year Warranty

Noctua products are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, both the supplied 120 mm NF-F12 and the 92mm NF-B9 fans features an MTBF rating of more than 150,000 hours and the entire NH-U9DX / NH-U12DX i4 packages comes with a full 6 years manufacturer’s warranty.

Image Gallery

SpecificationsNH-U12DX i4NH-U9DX i4
Socket compatibilityIntel LGA2011 (Square ILM & Narrow ILM), LGA2066, LGA1356, LGA1366 (with Xeon backplate)
Height (without fan)158 mm 125 mm
Width (without fan)125 mm 95 mm
Depth (without fan)45 mm 71 mm
Height (with fan)158 mm 125 mm
Width (with fan)125 mm 95 mm
Depth (with fan)71 mm 95 / 120 mm
Weight (without fan)580 g 560 g
Weight (with fan)755 g 550 / 640 g
MaterialCopper (base and heat-pipes), aluminium (cooling fins),
soldered joints & nickel plating
Fan size120 x 120 x 25 mm 92 x 92 x 25 mm
Warranty72 months
Fan specifications-
ModelNoctua NF-F12 PWM Noctua NF-B9 PWM
Number of fans supplied1 2
Fan Connector4-Pin PWM
Max. Rotational Speed (±10%)1500 RPM 1600 RPM
Max. Rotational Speed with L.N.A. (±10%)1200 RPM 1300 RPM
Min. Rotational Speed (PWM) (±10%)300 RPM
Max. Airflow54.97 CFM 37.84 CFM
Max. Airflow with L.N.A.43.73 CFM 25.73 CFM
Max. Acoustical Noise22.4 dB(A) 17.6 dB(A)
Max. Acoustical Noise with L.N.A.18.6 dB(A) 13.1 dB(A)
Input Power0.6 W 0.96 W
Voltage Range12 V
MTBF> 150.000 h
EAN barcode4716123314974 4716123314967

Our Address

Quiet PC Ltd
Brawby Grange
YO17 6PZ
United Kingdom

Our Numbers

Useful Information

Keep In Touch

MasterCardMaestroPayPalAmerican ExpressVisaVisa Electron
30 day money back guarantee
2 year warranty

All prices exclude import tax. © 2000-2019 Quiet PC Ltd. If you have seen an error on this page, please let us know.