Rails includedDual Power2 heatsinks includedBarebones Chassis only no Memory no CPUCan fit up to 4 x 3.5" HDD/SSD'sSystemboard Specifications:Dual Socket comptiable with Intel® Xeon® processor E5-2600 v3, Intel® Xeon® processor E5-2600 v4.Up to 1TB 3DS ECC RDIMM, DDR4-2400MHz; Up to 2TB 3DS ECC LRDIMM, in 16 DIMM slotsIntel® i350 Dual port GbE LAN10 SATA3 (6Gbps); RAID 0, 1, 5, 10Integrated IPMI 2.0 and KVM with Dedicated LAN6 USB 3.0 (4 rear, 2 via header)