This FSP300-60GHS 300 watt micro atx power supply is the 80 PLUS efficiency upgrade to the original FSP300-60GLS power supply. The new FSP300-60GHS power supply has dual 12V rails that distribute power more evenly than traditional single rail micro atx power supplies. This micro atx power supply fits into tight places, thanks to the fact that it is only four inches deep. At this time, the MP4ATX30 ps will be sent out as a compatible replacement for all orders. It is same size with the same connectors, Athena brand instead of FSP brand.