A single 140x140x25mm PWM fan is supplied with the Ouranos heatsink, though an extra set of wire fan brackets are included. The 160mm tall heatsink incorporates six heatpipes, four 6mm diameter and two 8mm diameter. The aluminum fin stack stands 120mm tall, 143mm wide and 70mm deep. Each stamped aluminum fin measures 0.3mm thick and is spaced 2.0mm apart from the next. The bottom-most cooling fin is elevated 38mm above the CPU for motherboard clearance.

Note that the body of the Reeven Ouranos is asymmetrically located over the heatspreader which makes contact to the CPU. The leading edge of the aluminum fins is flush to the copper base plate on one side and the trailing edge of the fins extends ~20mm out the other side. The two 8mm diameter heatpipes are centrally located, flanked by a pair of 6mm diameter heatpipes where there is generally less heat from the CPU below. The nickel plated copper heatspreader on the bottom of the Ouranos heatsink varies from 3mm to 6mm thick. The springy wire fan clips feature small finger grabs, which is always good to see.

The top of the Reeven Ouranos heatsink is covered with a name plate that covers the holes punched in the aluminum fins, for a more finished appearance. Between the fan and aluminum fins is a modest 4mm plenum. The nickel plated copper heatspreader measures 38x44mm.