An example heat exchanger may comprise a base to thermally conductively engage with a computing component, a plurality of fins that may extend from the base on the same side as the computing component, and an auxiliary fluid channel defined by the plurality of fins. The plurality of fins may transfer thermal energy from the computing component to a fluid medium surrounding the plurality of fins. The auxiliary fluid channel may facilitate the transfer of thermal energy from an electronic component, other than the computing component, disposed within the auxiliary fluid channel to a fluid medium flowing through the auxiliary fluid channel.