You are usually buying ONLY the service license serial number essential to improve the demo edition of PM FASTrack® to the complete working edition. It has 320 W standard or 90% high efficiency power supply.
HP Compaq 8200 Elite Microtower PC has rear I/O which includes (6) USB 2.0 ports, serial port, PS/2 mouse and keyboard ports, RJ-45 network interface, DisplayPort v1.1a and VGA video interfaces, and 3.5 mm audio in/out jacks.