360° View - Zalman VF900-Cu VGA Heatsink Information on Frostytech's test methodology is available here.
	The Heatsink Fan: The eleven bladed impeller on this 15mm thick 80mm fan creates a moderate amount of airflow through the copper cooling fins, and practically no noise. Compared to some stock VGA heatsink fans, the VF900-Cu is refreshingly quiet. The fan can be controlled with the Zalman Fan Mate 2 to operate at between 1350-2400RPM. Power comes via a standard 3-pin motherboard fan header which supports RPM monitoring. When installed, the Zalman VF900-Cu VGA heatsink will occupy one additional PCI slot worth of space adjacent to the videocard.
	Heatsink Top: With the 80mm fan removed from the Zalman VF900-Cu we have a clear look at how the unit is assembled. Two 5mm diameter copper heatpipes jut out from the base plate and then wrap around in circle along the outer edges of the copper fins. The copper cooling fins actually float above the base of the heatsink, and it's only the two heatpipes which connect each section and in fact hold the whole assembly together. The copper fins are 30mm long, 0.1mm thick. A specialized cast aluminum mounting bracket accomodates five different mounting hole patterns. Additionally, because the heatsink is set off-center to the base, exhaust airflow blows down onto the VGA memory which is located adjacent to the GPU.
	Heatsink Side A: The copper fins are spaced 1.5mm apart along the outer edge, and stand 18mm high. The entire VF900-Cu heatsink is only 30mm tall. The heatpipes are soldered to the copper fins to reduce thermal resistance at the joint.
	Heatsink Side B: The thin 4mm thick copper base is soldered to the two 5mm diameter copper heatpipes, and the aluminum frame is subsequently screwed into place on top.
	Heatsink Base: The base of the VF900-Cu VGA heatsink is 30mm in diameter, and the two heatpipes both pass close to the GPU core. This size base should cover the vast majority of GPU's on the market, from both the Geforce and Radeon stables. The surface finish is excellent, no doubt because the copper base has been copper plated after it was machined. Surface roughness is at or better than ~2 microinches, which is excellent. The base is perfectly flat in both axis... so be sure to only apply a very thin layer of thermal compound. The five sets of mounting holes for different videocard configurations flank the base here. A small metal post screws into the aluminum frame, and that passes through the videocard PCB.