Noctua's DX line of coolers has become a default choice in high performance quiet cooling solutions for Intel Xeon CPUs. The latest i4 revision supports LGA2011 (both Square ILM and Narrow ILM), LGA1356 and LGA1366 based Xeon platforms and the 12cm model NH-U12DX i4 comes equipped with Noctua’s award-winning NF-F12 Focused Flow™ fan with PWM for automatic speed control. Due to its slim design, the NH-U12DX i4 now provides easy access to the memory slots and better compatibility with tall modules. Fitted with the professional SecuFirm2™ mounting system and bundled with Noctua's industrial-grade NT-H1 thermal compound, the NH-U12DX i4 forms a complete premium quality package for quietly cooling Xeon based workstations and servers.
Cooler Specification 
Socket compatibility - Intel LGA2066, LGA2011-0 & LGA2011-3 (Square ILM & Narrow ILM), LGA1356, LGA1366 (with Xeon backplate) 
Height (without fan) - 158 mm 
Width (without fan) - 125 mm 
Depth (without fan) - 45 mm 
Height (with fan) - 158 mm 
Width (with fan) - 125 mm 
Depth (with fan) - 71 mm 
Weight (without fan) - 580 g 
Weight (with fan/s) - 755 g 
Material - Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating 
Fan compatibility - 120x120x25 
Scope of delivery:
- NF-F12 PWM premium fan
- Low-Noise Adaptor (L.N.A.)
- NT-H1 high-grade thermal compound
- SecuFirm2™ Mounting Kit
- Anti-vibration pads and fan-clips for second NF-F12
Warranty - 6 years
FAN Specification
Model - Noctua NF-F12 PWM 
Bearing - SS02 
Max. Rotational Speed (+/- 10%) - 1500 RPM 
Max. Rotational Speed with L.N.A. (+/- 10%) - 1200 RPM 
Min. Rotational Speed (PWM, +/-20%) - 300 RPM 
Max. Airflow - 93,4 m³/h 
Max. Airflow with L.N.A. - 74,3 m³/h 
Max. Acoustical Noise - 22,4 dB(A) 
Max. Acoustical Noise with L.N.A. - 18,6 dB(A) 
Input Power - 0,6 W 
Voltage Range - 12 V 
MTTF - > 150.000 h