The Noctua NH-D9L is a premium grade dual tower CPU cooler that has been designed to provide excellent quiet cooling performance at a height of only 110mm. Its 95 x 95mm footprint is designed to clear the RAM and PCIe slots on most ITX motherboards. Its low profile design makes it fully 3U compliant, and is ideal for compact HTPC and small form factor cases. Backed by a 6 year Noctua warranty.

PC Gameware Review
".. The tiny Noctua NH-D9L is sure to fit within almost any Gaming Rig set-up you can think of, it’s quiet and performs well enough for the task at hand" Full review