Supermicro SuperChassis CSE-503L-200B 1U Rm 1BAY Black 200W Pfc Depth Mini Low Noise 5 Led Case Type: 9.8" Mini 1U Rackmount M/B Type: Micro ATX, Max size upto 9.6 x 9.6 inch Processor Support: Single Intel Atom Series Processor Drive Bays: 1x 3.5" Internal Drive Bay Expansion Slots: 1x full-height/ half-length PCI Expansion Slot (Optional, Riser Card Required) Power Supply: 200W Low Noise AC-DC power supply with PFC