- SAS3 12Gb/s direct attached storage HDD backplane- 700W Redundant Power Supplies Gold Level Certified- 10x 2.5" Hot-swap SAS / SATA Drive Bays- 4x 4cm Counter-rotating PWM fans- 2x Full-height I/O Expansion slots & 1x Low-profile I/O Expansion slot- Supports maximum motherboard size 12" x 13"- Optimized for WIO motherboards