360° View - Xigmatek AIO-S80DP Heatsink Information on Frostytech's test methodology is available here.
	The Heatsink Fan: Under the sticker that says "Warranty Void if Removed" is the cap for the radiator, where a mixture of water, anti-corrosive and antifreeze has been blended to create a coolant which will hopefully resist corrosion and bacteria growth over the years. Since there are basically only rubber O-ring seals on the Xigmatek heatsink, loss of working fluid by vapour transmission loss isn't as much of a worry as if the system were using rubber tubing. An 80x80x25mm fan is hidden under the aluminum shell of the AIO-S80DP heatsink, and it draws air through one heat exchanger before blowing it out through a second heat exchanger. Noise levels hover around the 55.0 dBA mark at stock fan speeds. The fan connects via a 4-pin PWM compliant motherboard fan header, and the small 12V pump by a 3-pin power cable. The pump doesn't generate an audible noise signature.
	Heatsink Top Uncovered: Each brazed aluminum radiator is 22x80x87mm in size. The 80mm PWM fan sits in between each of the radiators, with a 15mm plenum on either side. The pump is permanently set into the base of the AIO-S80DP, where it pushes 72 L/hr of coolant around. The pump connects via its own power cord to any 3-pin motherboard fan header, or uses an included molex power adaptor. The aluminum radiators sit 48mm apart from each other.
	Heatsink Side A: The radiator is made from brazed aluminum sections, and occupies an effective space of about 80x80mm in area. Very thin aluminum fins connect fluid passages, and this is what allows the heat from the coolant inside to be transferred to the surrounding environment. Under the cap is a clear antifreeze coolant. The vertical fluid channels are 2mm thick, spaced 7.5mm apart. The fine aluminum fins are spaced a little over 1.3mm apart so as not to restrict airflow significantly.
	Heatsink Side B: The opposite side of the Xigmatek AIO-S80DP heatsink is identical. The trapezoidal shaped aluminum base is 36mm tall, and acts as the reservoir for holding cooling fluid. The pump is supported in this tank directly over the copper base plate, which is visible at the very bottom. The aluminum tank, and joints between the aluminum and copper are both sealed water tight with rubber washers.
	Heatsink Side C: From the opposite side, the fan shroud is all that's visible. Note the springy metal mounting clips which come pre-attached to the Xigmatek AIO-S80DP heatsink. Screws are used to firmly attach the cooler to one of the three sets of mounting brackets, and in turn apply the necessary pressure to the CPU below. The fan is mounted to the fan shroud at the top, as you can see from the cut out. During our tests, high resonance vibrations between the aluminum shroud and the rest of the heatsink were audible. Adjusting the tension on the screws which hold the shroud to the heatsink made the resonance disappear. The Xigmatek AIO-S80DP heatsink stands 131mm tall. At its widest point, the heatsink is 103mm wide.
	Heatsink Base: The copper base of the Xigmatek AIO-S80DP heatsink is fully machined, and the portion which makes contact with the CPU measures 37 x 37mm (overall size is 70x54mm). The base is at least 6.5mm thick, and it's safe to assume it extends into the body of the reservoir about 10mm or so. The base is perfectly flat in both axis, with a smooth CNC machined finish. Surface roughness is on the order of ~8 microinches, which is considered excellent. There is a rubber gasket between the copper base (held on with eight screws) and aluminum reservoir. Xigmatek used steel thread inserts to ensure the lower half of the aluminum reservoir remains firmly attached to the upper plate; in general build quality of the Xigmatek AIO-S80DP heatsink is excellent.