Key Features2U Rackmount Chassis - 26.75" (D) Supports four systems (nodes).1. 1620W Redundant Power Supplies 80 PLUS, Platinum Level (94%)2. 24x 2.5" hot-swap SAS/SATA HDD w/ SESII support (6x HDD per node)3. 4x Front control panel with UID (independent control & failed monitor)4. 4x 80mm PWM cooling fans5. 4x Low-profile AOC slots (1 per node)6. Supports twin motherboard size up to: 6.8" (172mm) x 16.64" (422mm)