The CPU also houses system management components, and it's one reason you see BIOS ROMs very close to the CPU rather than to the chipset as on Intel motherboards. The X300 and A300 chipsets will offer authentication for the system, and no IO, and will be significantly smaller than the X370 chipset and its offspring, making them perfect for SFFPCs. However, BIOSTAR has jumped the gun and has brought to market the only Mini-ITX X370 motherboard; the X370GTN.