This kit adapts the form factor so that the H4 board can be mounted on a Mini-ITX case for a desktop PC or a DIY NAS. Important information The ATX power supply unit supplies 12 V to the H4 board. If you are using SATA hard drives, SSDs or other devices, power them from the ATX power supply unit, not from the H4 board. Reason: An H4 board can only power hard drives correctly if it is powered itself by a 19 V/133 W power supply unit, especially during cold boot. The H4 Mini-ITX kit is designed for H4 boards only and is not compatible with H2/H3 boards. Parts list