SC813S-520   SC813S-520  
    1. 520W Cold-Swap Power Supply

2. 4 x 3.5" Hot-swap U320 SCSI Drive Bays

3. 1x Slim CDROM Drive and
1x Slim Floppy Drive

4. 2x 10cm Blower Fan

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