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