DESC: The Antec Sonata III 500 Super Mini Tower combines style, silence, and efficiency. The Sonata III is whisper quiet when it comes to system noise and the High Definition front audio ports ensure that music will be crystal clear. Use the convenient front eSATA connector for simple data transfer. It is all powered by the EarthWatts 500-watt power supply unit, which is equipped with universal input and Active PFC. This power supply unit is 80-plus certified, one of the most efficient available.