The 120mm fan spins at 800-2000RPM and draws power from a standard 3-pin motherboard fan header. The fan is barely held on by four rubber vibration absorbing posts which are spaced longer apart than the length of slots in the aluminum fins. Five 8mm diameter copper heatpipes rise up through bare aluminum fins which have a dimpled surface texture. Each aluminum fin measures 0.3mm thick and is spaced ~1.75mm apart.

The SilenX EFZ-120HA4 heatsink heatsink stands 151mm tall, the bottom-most fin being 40mm above the CPU socket for clearance. The five heatpipes are positioned side to side where they make direct contact with the processor, and expand outward to form an X shaped pattern through the aluminum fins. The base incorporates a 10mm thick aluminum section to provide support for clamping, with 11mm extruded aluminum fins above for added cooling.

Looking at the SilenX EFZ-120HA4 heatsink from the top we can see the dimpled aluminum texture. The edges of the stamped aluminum fins are sharp, so take care when handling this cooler. The pattern of heatpipes passing through the fins helps to ensure equitable heat conduction to the areas receiving the most airflow from the 120mm fan. The base of the heatsink measures 40x53mm in size. The five 8mm diameter heatpipes are spaced about 1.5mm apart.