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 Legacy Intel® Core™ Processor Intel Core i3-2xxx Lenovo ThinkPad T420i, Intel® Core™ i3, 2.3 GHz, 35.6 cm (14"), 1600 x 900 pixels, 4 GB, 500 GB Lenovo ThinkPad T420i. Form factor: Clamshell. Processor family: Intel® Core™ i3, Processor model: i3-2350M, Processor frequency: 2.3 GHz. Display diagonal: 35.6 cm (14"), HD type: HD+, Display resolution: 1600 x 900 pixels. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 500 GB, Storage media: HDD, Optical drive type: DVD Super Multi. On-board graphics card model: Intel® HD Graphics 3000. Operating system installed: Windows 7 Professional. Product colour: Black