Direct Attached Backplane (you can run either 8 bays on 8 ports controller and 4 port to your MB)Backplane Compatible with 1TB, 2TB, 3TB, 4TB, 6TB, 8TB 10TB 12TB 14TB 16TB Hard DrivesPerformance Specs:Chassis only- BAREBONE.  Come with no Motherboard. Can fit ATX or E-ATX  (supports for maximum motherboard sizes: 13.68" x 13" )Processor: NO CPUsMemory: (NO Memory )Hard Drives:  None Caddies: Comes with all 12x 3.5" Hard Drive Caddies Controller: NoneNIC:NoneSecondary Chassis/ Motherboard specs:Supermicro 2U 12x 3.5" Drive BaysServer Chassis/ Case: CSE-826A-R920LPBMotherboard: NO MOTHERBOARD* Integrated IPMI 2.0 ManagementBackplane:   BPN-SAS-826A I-Path Direct Attached BackplanePCI-Expansions slots: NoneDrive bay: 12x 3.5" Supermicro caddyNo Power Supply IncludedHowever 740W, 800W, or 900W Power Supplies can be addedShipping to lower 48 only.BUY NOW!I HAVE A QUANTITY OF THESEThis Account is over 16 Years Old - 100% Positive Feedback - We are old and Dependable