- 600W High-efficiency Power Supply with Digital Switching Control- 4x 2.5" Hot-swap SAS / SATA Drive Bays- 3x 40x56mm 4-pin PWM fans and 2x 40x28mm 4-pin PWM fans for add-on card (optional)- 1x Full-height I/O Expansion slot- Supports motherboard sizes of 12" x 13" & 12" x 10" (E-ATX, ATX, or Micro-ATX)