SC510-203B 1. 200W High-efficiency Power Supply 80 PLUS, Gold Level Certified 2. 1x 3.5" Internal Drive Bay 3. OR Up to 4x 2.5" Internal Drive Bays (Optional) 4. OR 1x Full-height, Half-length PCI Expansion Slot (Optional) 5. OR up to 2x 2.5" (with single retention bracket) and 1x FH, HL PCi 6. 1x 8500 RPM Cooling Fan 7. Power Switch, Reset Button & 5 LED Indicators 8. Extra Compact Size