SC512F-520   SC512F-520  
    1. 520W Power Supply

2. 1x 3.5" Internal Drive Bay

3. 1x Slim DVD-ROM Drive

4. 3x 12900RPM Counter-rotating Fan

5. 1x I/O Expansion Slots

6. 2x Rear, 2x Front USB Ports

7. Power Switch & 5 LED Indicators