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