Rails includedDual Power8 Heatsinks includedBarebones Chassis only no Memory no CPUCan fit up to 24 x 2.5" drives. 6 Drive bays per nodeDrive caddies are not included. If you wish to purchase some please contact Tom Cradick.Systemboard Specifications:Dual Socket comptiable with Intel Xeon processor E5-2600 v3, Intel Xeon processor E5-2600 v4 per nodeUp to 2TB ECC 3DS LRDIMM , up toDDR4- 2400†MHz; 16 DIMM slots per node1 PCI-E 3.0 x16, 1 PCI-E 3.0 x8 (Proprietary slot), 1 PCI-E 3.0 x8 and 1 PCI-E 3.0 x16 (for Supermicro storage add-on card) per nodeIntel® i350-AM2 Dual port GbE LAN per node10 SATA3 (6Gbps) per nodeIntegrated IPMI 2.0 and KVM with Dedicated LAN per node2 USB 3.0 ports (2 rear) per node