Socket compatibility LGA1366 (backplate with screw threads for CPU cooler installation required) 
Height (without fan)  155 mm
Width (without fan)  126 mm
Depth (without fan)  65 mm
Height (with fan)  155 mm
Width (with fan)  126 mm
Depth (with fan)  90 mm
Weight (without fan)  600 g
Weight (with fan)  770 g
Material  Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating 
Application  Intel Xeon 55xx 
Fan compatibility  120x120x25mm / 120x120x38mm (2 fans can be installed) 
Scope of Delivery  1x NH-U12DX Heatsink
1x NF-P12 fan
Mounting-clips for 2 fans
Ultra-Low-Noise-Adaptor (U.L.N.A.)
NT-H1 thermal compound
SecuFirm2™ mounting kits for LGA1366
Warranty  6 Years 
 
 
Fan specifications    
Model  Noctua NF-P12 
Bearing  SSO-Bearing 
Blade geometry  Nine Blade Design 
Rotational Speed (+/- 10%)  1300 RPM
Rotational Speed with L.N.A. (+/- 10%)  1100 RPM
Rotational Speed with U.L.N.A. (+/- 10%)  900 RPM
Airflow  92,3 m³/h
Airflow with L.N.A.  78,5 m³/h
Airflow with U.L.N.A.  63,4 m³/h
Acoustical Noise  19,8 dB(A)
Acoustical Noise with L.N.A.  16,9 dB(A)
Acoustical Noise with U.L.N.A.  12,6 dB(A)
Input Power  1,08 W
Voltage Range  12 V
MTBF  > 150.000 h