1x Heatsink included2x PSU included4x Drive trays includedNO RAILS INCLUDED1. Single socket R (LGA 2011) supports Intel® Xeon® processor E5-2600 and E5-2600/1600 v2 family†2. Intel® C602 Chipset3. 4x 3.5" Hot-swap drive bays4. Up to 512GB ECC DDR3, up to 1866MHz; 8x DIMM slots5. Expansion slots (PCI-E 3.0): 2 x16 Full-height & 1 x8 Low-profile6. Intel® i350 Dual Port Gigabit Ethernet7. Integrated IPMI 2.0 and KVM with Dedicated LAN8. SATA3 (6Gbps) w/ RAID 0, 1, 5, 10 SATA2 (3Gbps) w/ RAID 0, 1, 5, 109. 500W Redundant Power Supplies Platinum Level (94%+)10. SATA Disk-on-module (DOM) power connector