Full Details on Amazon.com : http://www.amazon.com/gp/product/B007C861WO?tag=tsukuyomi-20

Noctua NH-L12 Low-profile Quiet CPU Cooler with 120/90mm Dual PWM Fan

12092mm dual fan design Thanks to its exquisite dual fan setup consisting of Noctuas highly optimized NF-F12 120mm and NF-B9 92mm premium fans the NH-L12 pushes the bar in terms of low-profile quiet cooling performance
The NH-L12 can be used with the NF-B9 92mm fan only in order to reduce the overall height to 66mm This way the cooler is suitable for many typical ?ATX or Mini-ITX enclosures and ideal for whisper-quiet HTPC systems
PWM support and Low-Noise Adaptors The NH-L12s NF-F12 and NF-B9 fans support PWM for convenient automatic speed control In addition the maximum fan speed can be reduced to 12001300rpm using the supplied Low-Noise Adaptors for even quieter operation
Noctuas enthusiast grade SecuFirm2 multi-socket mounting provides broad socket compatibility LGA 2011 LGA1366 LGA1156 LGA1155 LGA775 AM2 AM2 AM3 AM3 FM1 and meets the highest demands in safety performance and ease-of-use
Some Intel based Mini-ITX main boards dont allow for the installation of backplates The NH-L12 thus comes with an extra set of Intel mounting bolts which make it possible to install the cooler without using the SecuFirm2 backplate
Fan Size Noctua NF-F12 PWM NF-B9 PWM Compatibility Intel LGA 2011 LGA 1366 LGA 1156 LGA775 AMD AMD2 AM2 AM3 AM 3 FM 1 Backplate required Bearing SSO-Bearing Self-stabilizing oil-pressure bearing RPM - 10 15001600 RPM Max 12001300 RPMwLNA