Full Details from Amazon.com : http://www.amazon.com/gp/product/B00DWFQ42I?tag=onigi-20
Noctua i4 CPU Cooler for Intel Xeon CPU_ LGA2011 1356 and 1366 Platforms NH-U12DXi4
With only 45mm fin depth slim design NH-U12DX i4 ensures easy access to the RAM slots When installed parallel to the slots it wont overhang the memory on LGA1356 LGA1366 LGA2011 Square ILM even with 2 fans installed
Recommended by more than 150 hardware publications and thousands of enthusiasts world-wide the Noctuas NF-F12 Focused Flow 120mm fan is renowned to combine superb static pressure excellent heat sink performance and surprising quietness of operation
The NF-F12 120mm fan supplied with the NH-U12DX i4 supports PWM for convenient automatic speed control through the mainboard The maximum fan speed can be reduced from 1500 to 1200rpm using the supplied Low-Noise Adaptor for even quieter operation
Optional NF-F12 fan to create a pushpull setup the NH-U12DX i4 includes fan clips and an extra set of custom-designed anti-vibration pads that allow to offset the rear fan by 5mm to improve acoustics in dual-fan mode
Supporting Intels LGA2011 both Square and Narrow ILM LGA1356 and LGA1366 Xeon platforms the SecuFirm2 mounting included with the NH-U12DX i4 guarantees perfect contact pressure and maximum convenience on all sockets
Having received more than 100 awards and recommendations from hardware journalists around the world Noctuas NT-H1 is a proven professional grade TIM solution that provides minimum thermal resistance excellent ease of use and outstanding reliability