2. 3 x 3.5" Hot-swap Drive Bays
3. 1 x Slim DVD-ROM Drive
1 x Slim Floppy Drive (Optional)
4. 4 x 80mm 6300 RPM Fan
5. With Universal I/O (UIO) Card:
3 x Full-height I/O
3 x Low-Profile Expansion Slots
Without Universal I/O (UIO) Card:
4 x Full-height
3 x Low-Profile Expansion Slots
6. 1x Serial, 2x USB Front Access I/O
7. Power Switch & 6 LED Indicators