Real server boards will not have enthusiast settings in the BIOS, always have ECC support and a server based chipset. Storage and i/o options are also better along with monitoring and better network interfaces, etc. Mid range boards feature multiple sockets and higher memory support. Higher end server boards support 2-8+ CPU sockets and 100s of GB of RAM on plug in riser cards. They will also feature multiple failover PSU support with SNMP trapping, etc.