SC813MS-520C
1. 520W High-efficiency Power Supply
2. 4x 3.5" Hot-swap U320 SCSI Drive Bays
3. 1x Slim CDROM Drive (Optional)
5. 4x 4cm 12,500 RPM Fan
6. 1x Full-height, Half-length I/O Expansion Slot
7. Power Switch / Reset & 5 LED Indicators