Product Features Intel Core i5-2410M Processor 2.3 GHz (2.9 GHz with Turbo Boost Technology), 3MB Cache Configured with 4GB DDR3 1333MHz (max 8GB) Genuine Windows 7 Home Premium 64-bit with a 6 cell/48Wh Lithium Ion battery pack; Battery Life (measured by MobileMark 2007): 8 hours 13.3" diagonal widescreen TruBrite TFT display at 1366 x 768 native resolution (HD) with 16:9 Aspect Ratio and LED Backlite 640GB (5400 RPM); Serial ATA hard disk drive with TOSHIBA Hard Drive Impact Sensor (3D sensor) Processor, Memory, and Motherboard Hardware Platform: PC Processor: 2.9 hertz Intel Core i5 Number of Processors: 2 RAM: 4 GB RAM Type: SODIMM Memory Slots: 2 Hard Drive Size: 640 GB Manufacturer: Serial ATA hard disk drive Type: Serial ATA Speed: 5400 rpm Ports and Connectivity USB Ports: 3 Cases and Expandability Size (LWH): 12.44 inches, 8.94 inches, 1.05 inches Weight: 3.2 pounds Power Rated Charge (normal use): 8 hours