ASUS K51AC, 2.1 GHz, 15.6", 1366 x 768 pixels, 3 GB, 320 GB, Windows 7 Home Premium ASUS K51AC. Processor model: RM-75, Processor frequency: 2.1 GHz. Display diagonal: 15.6", Display resolution: 1366 x 768 pixels. Internal memory: 3 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 320 GB, Optical drive type: DVD Super Multi. Discrete graphics card model: AMD Mobility Radeon HD 3200. Operating system installed: Windows 7 Home Premium. Weight: 5.95 lbs (2.7 kg)