In the examples provided herein, an apparatus has modules to be cooled during operation, where each module is coupled to a heatsink, and the heatsinks are coupled to a first surface of a thermally conductive plate. The modules are positioned along a direction from a first side of the plate toward an opposite side of the plate. The apparatus also has heat pipes coupled to a second surface of the plate to transport heat away from the modules during operation, where the heat pipes are positioned nonuniformly along the direction.