360° View - Noctua NH-U9 Heatsink Information on Frostytech's test methodology is available here.
	The Heatsink Fan: Looking at the top of the heatsink we can see the tips of the four 6mm diameter copper heatpipes poking through. The 38 nickel plated aluminum fins are each roughly 95 x 58mm in size, and that adds up to a significant cooling surface area. The tabs on either edge are for the wire fan clips to lock into.
	Heatsink Top: The entire Noctua NH-U9 heatsink stands 128mm high, with each of the 38 aluminum fins measuring 0.5mm thick. Fin spacing is 2.0mm, as this allows slower RPM fans to be used as there is less airflow resistance. The notches along the edges of the fins in this perspective allow 92mm or 80mm fans to fit in snugly. The 8mm thick copper base is shown without any of the processor specific mounting hardware installed.
	Heatsink Side A: The widely spaced nickel plated aluminum fins are all soldered to the four copper heat pipes which rise up from the base. There are no specific instructions for orienting the Noctua NH-U9 in a specific way, other than setting the fan to blow hot air towards the rear of the case.
	Heatsink Base: The useable area of the copper base is 35 x 49mm, just shy of the AMD Athlon64's 37.5 x 37.5mm integrated heat spreader dimensions... The copper surface has been face milled flat, with surface roughness in the 32 microinches area. A small tube of white silicon thermal compound is included in the heatsink package.