How's this for a maximum cooling package? Tailor-made for a Dual Xeon set-up,
the Noctua NH-U12DX High Performance Cooler boasts a dynamic fin shape that has been modified so that the two attached coolers will form an air duct on a Dual Xeon.  This beneficial design has the ability to produce exceptional cooling performance at incredibly low noise levels.
This Noctua High Performance Cooler features a SecuFirm2™ mounting system  for Socket 771 and 604. Completely pre-installed, this new system will ensure maximum convenience and ridiculously short install times. In addition, the NH-U12DX will also work as a simple drop-in replacement for standard Intel coolers, making it fully compatible with your original Intel installation system.
The  NH-U12DX is included with Noctua's renowned NF-P12 120mm premium fan, an exceptionally quiet cooling component which features psychoacoustic optimizations and Noctua's own premium-grade SSO-bearing. Also included in the package is Noctua's highly acclaimed NT-H1 thermal compound, a pro-grade, easy-to-use TIM solution that provides minimum thermal resistance and welcome reliability.
Features:
 	- Tailor-made for Dual Xeon Set-Ups
 - SecuFirm2™ Mounting System for Socket 771 & 604
 -  	Drop-in Replacement for Standard Intel Coolers
 - NF-P12 120mm premium fan (Included)
 - NT-H1 Thermal Compound (Included)
 
Specifications:
- Socket Compatibility: Intel LGA 771 & mPGA 604 (10mm mounting-holes only)
 - Dimensions (w/o Fan):		126 x 65 x 155mm
 - Dimensions (w/ Fan):		126 x 90 x 155mm
 - Weight:		600g (w/ Fan) / 770g (w/o Fan)
 - Material:
- Copper (Base & Heat-Pipes)
 - Aluminum (Cooling Fins)
 - Soldered Joints & Nickel Plating
 
 - Application:		Intel Xeon 5xxx & Xeon 7xxx
 - Fan Compatibility:		120mm / 120mm (2 fans can be installed)
 - Scope of Delivery:
		
- 1 x NH-U12DX Heatsink
 - 1 x NF-P12 fan
 - Mounting-clips for 2 fans
 - Ultra-Low-Noise-Adaptor (U.L.N.A.)
 - NT-H1 thermal compound
 - SecuFirm2™ mounting kits for 771/604
 
 
Fan Specs:
- Model:		Noctua NF-P12
 - Bearing:		SSO-Bearing
 - Blade Geometry:		9-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 w/ L.N.A:		16,9 dB(A)
 - Acoustical Noise w/ U.L.N.A:		12,6 dB(A)
 - Input Power:		1,08 W
 - Voltage Range:		12 V
 - MTBF:		> 150.000 h
 
Note:  this item is a single cooler.  To cool both CPUs in a dual-Xeon system, you will need two of these.