DELL XPS 15 (L502x) Notebook Intel Core i7 2670QM(2.20GHz) 15.6" 8GB Memory DDR3 1333 750GB HDD 7200rpm 8X CD/DVD Burner (Dual Layer DVD+/-R Drive) NVIDIA GeForce GT 525M Dell XPS 15 L502x i7-2760QM 2.40 GHz w/ Turbo Boost 2.0 up to 2.90 GHz Quad core 8GB, 667MHz DDR3 RAM, 750GB 7,200rpm HDD Bluray Disc BD-Combo Win 7,MS Office,15.6HD Screen,NVIDIA GeForce GT540M 2GB