Key Features 8x 3.5"/2.5" SAS3/SATA3 Backplane for Hot-Swappable Drives Whisper-Quiet (<27dB) Front HDD Door Lock & Side Panel Intrusion Switch Front I/O Ports: 2x USB 3.0 2x 8cm PWM Fans & 1x 9cm Rear PWM Fan 4U / Full Tower Chassis Supports max. Motherboard, Sizes – E-ATX 12" x 13"/ATX/Micro ATX 1200W Platinum Level Certified High-Efficiency Power Supply 3x 5.25" External HDD Drive Bays & 8x 3.5"/2.5" Hot-Swappable HDD Drives