Toshiba Qosmio X505-Q893 TruBrite 18.4-Inch Laptop (Black) Intel Core i5-460M Processor 2.53 GHz (2.80 GHz with Turbo Boost Technology), 3MB L3 Cache Configured with 4GB DDR3 1066MHz (max 8GB) 2 main memory slots. Both slots occupied. 500GB (7200 RPM) Serial ATA hard disk drive with TOSHIBA Hard Drive Impact Sensor (3D sensor), DVD SuperMulti drive supporting 11 formats 18.4" diagonal widescreen TruBrite TFT display at 1680 x 945 native resolution (HD) with native support for 720p content, NVIDIA GeForce GTX 460M with 1.5GB GDDR5 discrete graphics memory Genuine Windows 7 Home Premium 64-bit with a 12 cell/48Wh Lithium Ion battery pack; Battery Life (measured by MobileMark 2007): 3 hours, 47 minutes