ENERGY STAR® is the government-backed symbol for energy efficiency, providing simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. ENERGY STAR is the simple choice for energy efficiency, making it easy for consumers and businesses to purchase products that save them money and protect the environment. ENERGY STAR Shuttle SH55J2, LGA 1156 (Socket H), 300 W Shuttle SH55J2. Processor socket: LGA 1156 (Socket H). Maximum internal memory: 16 GB. Ethernet LAN (RJ-45) ports: 1. Power supply: 300 W