Toshiba Qosmio X775-Q7270 (17.3-Inch Screen) Laptop 2.3 GHz Intel Core I5 6 GB SO-DIMM 640 GB 7200 rpm Hard Drive 17.3-Inch Screen, NVIDIA GeForce GTX 560M with NVIDIA Optimus Technology featuring 1.5GB of GDDR5 discrete graphics memory Windows 7 Home Premium 64-bit, 4hours Battery Life 2.3 GHz Intel Core I5 6 GB SO-DIMM 640 GB 7200 rpm Hard Drive, 8x SuperMulti DVD drive 17.3-Inch Screen, NVIDIA GeForce GTX 560M with NVIDIA Optimus Technology featuring 1.5GB of GDDR5 discrete graphics memory Windows 7 Home Premium 64-bit, 4hours Battery Life