IBM X3650 M5 IS A 2U RACK SERVER.THIS SERVER ALSO HAVE 4 X 2.5" CHASSIS , 2 X E5-2670v3 2.3 GHZ SPEED & 12 CORE PROCESSOR ,256 GB RAM , 2 X 240GB SSD 2 X 1.2TB 10k AND M5210 RAID CARD. ALSO IN THIS SERVER NO OPERATING SYSTEM IS INSTALLED. THERE ARE TWO POWER SUPPLY UNITS AND ALSO INCLUDE RAIL KIT.