360° View - Akasa AK-873 Heatsink Information on Frostytech's test methodology is available here.
	The Heatsink Fan: The 80mm fan spins at 3400RPM by default. To reduce noises an included fan speed controller will drop its speed down to 1500RPM. The translucent blue seven bladed impeller is internally illuminated by four blue LEDs. The effect is subtle, but gives the Akasa AK-873 a unique appearance. Airflow is specified at 16-40CFM by the manufacturer. The fan draws power from a standard 3-pin motherboard connector that supports RPM monitoring.
	Heatsink Top: The stacked AL-977 aluminum fins measure are each nickel plated to permit soldering with the copper base at the very bottom, and the two large heat pipes. Each fin measures 0.3mm thick, and is spaced 1.0mm apart from the next. The K8 mounting clip is shown running along the center line of the heatsinks, though it is elevated 35mm above the base.
	Heatsink Side A: The cooling fins stand 49mm tall, and the heatsink is 75mm high overall. The fan intakes cool air, blows it down into the aluminum fins where the warm exhaust air then exits at either side of the heatsink to further cool northbridge chipsets, or adjacent power circuitry.
	Heatsink Side B: The heatsink retention mechanism is dead simple; using just the center tab of the socket AM2, or all three tabs on the socket 939 heatsink retention frame, to lock itself in position. A cam lever at each end then applies the appropriate clamping force. Notice the 8mm diameter heatpipes move from the center of the copper base plate, and out towards the outer edges of the aluminum cooling fins. The copper base plate is 6mm thick.
	Heatsink Base: The nickel plated copper base measures 40mm x 74mm in size. The metal has a sanded finish and comes with a pre-applied patch of Akasa AK-455 thermal compound. The base is pretty flat along both axis. Surface roughness is about ~63 microinches, which is considered satisfactory. Because the base does not extend the full width of the heatsink, there is a good 16mm of exhaust ventilation along either edge. Also not how each of the two 8mm diameter copper heatpipes exit the heatsink and extend in opposite directions towards the outer edges of the aluminum cooling fins.