2. 4 x 3.5" Hot-swap SAS/SATA Drive Bays
3. 1x Slim DVD-ROM Drive (Optional),
1x Slim Floppy Drive (Optional)
4. 4x 4cm Cooling Fans
5. 1x Full-height Universal I/O (UIO Expansion Slot)
6. 1x Full-height, Full-length I/O Expansion Slot
7. 1x Low-profile I/O Expansion Slot
8. Power Switch, Reset, UID Button & 5 LED Indicators