Instead of using the stock cooler, this
Level1Techs forum member mounts the Odroid H4 board inside a significantly larger aluminum case that acts as a giant heatsink. The Odroid H4 is very efficient, but under sustained high loads, the stock cooler can heat up fast. By using a case with a much higher thermal mass, it takes significantly longer for the system to reach peak temperature. The oversize approach also allows additional internal components like SATA drives or even a power supply. Total success.