Lenovo ThinkPad Edge E525, AMD A4, 2.5 GHz, 39.6 cm (15.6"), 1366 x 768 pixels, 4 GB, 500 GB Lenovo ThinkPad Edge E525. Form factor: Clamshell. Processor family: AMD A4, Processor model: A4-3300M, Processor frequency: 2.5 GHz. Display diagonal: 39.6 cm (15.6"), Display resolution: 1366 x 768 pixels. Internal memory: 4 GB. Total storage capacity: 500 GB, Storage media: HDD, Optical drive type: DVD Super Multi. On-board graphics card model: AMD Radeon HD 6480G. Operating system installed: Windows 7 Professional. Product colour: Black. Weight: 2.4 kg