The HDPlex H3 is the best performing fanless heatsink-case mini pc, able to cool a wide variety of processors. The case measures only 10.6×11.3×4.0 inches (LxWxH). The H3 case is a heatsink that directs heat from the internal parts to the outside of the case through six heatpipes. It is compatible with Mini ITX and Thin Mini ITX motherboards and processors with TDPs of up to 65W. There is space for up to 4 2.5″ storage drives. Due to its size, it is not compatible with graphics cards. It is compatible with other PCIe x16 expansion cards. The case has a 3.5 mm audio jack, 2 USB 3.0 ports, 2 USB 2.0 ports, and a power on/off button on its right side. It is compatible with external power supplies.