Gelid's Tranquillo 4 heatsink ships with a 120mm PWM fan that draws power from a standard 4-pin fan header. The 152mm tall heatsink employs four 6mm diameter copper heatpipes which rise up through a 100mm tall aluminum fin stack. The aluminum fins measure 0.4mm thick and are spaced 2.0mm apart. The bottom-most fin is elevated 42mm above the socket for motherboard component clearance.

The wire fan clips lack thumb holds so the entire heatsink measures just 128mm wide. Heat pipes are soldered to the copper base plate and to the nickel plated aluminum fins. The heatpipes are generally positioned in the path of highest airflow from the fan, so the maximum amount of heat energy is conducted to the region of aluminum fins which receives the most airflow.

The area of the exposed copper heatpipes on the base of the Gelid Tranquillo 4 heatsink measures 39x30mm in size. The extruded aluminum cap on top is 8mm thick.