Custom motherboard microATX form factor Variation A mobile i7 socket - supporting quad core capable of addressing 32 gig of memory 4 SO-DIMM slots 2 gig-e Ethernet; low power PHYs no audio no extra video besides chipset supplied VGA 1 PCI-e slot from CPU 8 SATA-2 ports (SATA-3?) IPMI port Variation B 2 SO-DIMM slots 4 SATA-3 ports Variation C 6 SATA-3 ports Variation D mobile i5 socket - dual core capable addressable 16 gig memory 2 SO-DIMM slots 4 SATA-2 ports 2 gig-E ethernet ports IPMI port