Prolimatech 360° View - Prolimatech Megahalems Heatsink

360° View - Prolimatech Megahalems Heatsink

Information on Frostytech's test methodology is available here.

Prolimatech's Megahalems 160mm tall heatsink accommodates one 120mm fan (not included) on either side of the aluminum fin towers. Additional notches make it possible to install a second 120mm fan, though extra wire clips are not provided. Six U-shaped 6mm copper heatpipes are packed closely at the base and loop around to both sides 110mm fin towers. The nickel plated aluminum fins 0.4mm thick and spaced 1.75mm apart. There is 40mm clearance at the base for adjacent motherboard components. The base block measures 12.5mm thick.

The base of the Megahalems heatsink measures 40x42mm in size and is razor smooth. The base plate is nickel plated copper, ranging from 2.3mm to 5mm thick. From this angle we can clearly see the slots for the springy wire clips to hold 120mm fans in position, on either side of the heatsink. The ~47 individual cooling fins are roughly 63x70mm in size. Note the 5mm space down the center of the heatsink.

Base Finish and Flatness

Flipping a heatsink over to inspect the business end is often a simple indicator of overall cooler quality. More practically speaking, a heatsink is in many ways only as effective as the contact it makes with the processor - the flatter and smoother the better. Base finish is one of the criteria that Frostytech measure in the course of evaluating heatsinks, and it involves two distinct aspects. Surface Finish is the first; this is calculated with the aid of Surface Roughness Comparator that has a cross section of common machine surface finishes and their numerical surface roughness equivalents in microinches. The second is Surface Flatness. This is tested with an engineers straight edge or proven flat surface, in two axis.

The nickel plated copper base of the Prolimatech Megahalems heatsink is perfectly flat in one axis and very slightly convex in the opposite (it's nearly flat). The metal has been machined very smooth, surface roughness is ~4 microinches or better, which is excellent.

Next up on Frostytech acoustic measurements for the two fans used to test the Megahalems heatsink and then it's onto thermal test results.

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