CPU Socket

 Dual socket R (LGA 2011) supports Intel® Xeon processor E5-26**v2 family

 Dual socket R (LGA 2011) supports Intel® Xeon processor E5-26**v2 family

 Dual socket R3 (LGA 2011) supports Intel® Xeon processor E5-26**v3/v4 family

 Chipset

 Intel® C602 chipset

 Intel® C602 chipset

 Intel® C612 chipset

 Memory

 Up to 1TB ECC DDR3, up to 1866MHz; 16x DIMM slots

 Up to 512GB ECC DDR3, up to 1866MHz; 8x DIMM slots

 Up to 3TB ECC 3DS LRDIMM , up to DDR4-2400MHz ; 16x DIMM slots

 PCI Slots

 2 PCI-E 3.0 x16 and 4 PCI-E 3.0 x8

 1 PCI, 1 PCI-E 2.0 x1, 3 PCI-E 3.0 x8, 1 PCI-E 2.0 x4 (in x8)

 3 PCI-E 3.0 x16 and 3 PCI-E 3.0 x8

 Network Controllers

 Intel® i350 GbE controller (4 ports)

 Intel® 82574L GbE LAN, 2 ports

 Intel® i350 Dual port GbE LAN

 SATA ports

 8x SATA2 and 2x SATA3 ports

 8x SATA2 and 2x SATA3 ports

 10x SATA3 (6Gbps); RAID 0, 1, 5, 10

 IPMI

Integrated IPMI 2.0 and KVM with Dedicated LAN

Integrated IPMI 2.0 and KVM with Dedicated LAN 

 Integrated IPMI 2.0 and KVM with Dedicated LAN

 USB

 7x USB 2.0 ports (2 rear, 4 via header + 1 Type A)

 9x USB 2.0 ports

 5x USB 3.0 (2 rear, 2 via header, 1 Type A), 6x USB 2.0 (2 rear, 4 via header)