Antec ATLAS Black Server Case 550W External 5.25" Drive Bays Power Supply included: TruePower 2.0 550W ATX12V v2.01 and EPS12V compatible - Precise 3% power regulation - Dedicated power circuitry delivers more reliable output Advanced cooling system: - 1 rear 120mm TriCool 3-speed fan - 2 front mounts for optional 92mm fans - Side Panel vent with mount for optional 80mm fan to provide maximum cooling to the VGA card 8 Drive Bays - Front Accessible: 4 x 5.25inches (with one 5.25inches to 3.5 adapter) - Internal: 4 x 3.5 removable HDD trays with rubber grommets to isolate drive vibrations Front-mountedports for easy multimedia connections - 2 x USB 2.0 - 1 x IEEE 1394 (FireWire, i.Link) - Audio In and Out Removable side panel with easy-access thumb screws