Lenovo ThinkPad Edge E545 AMD Quad-Core A10-5750M 2.5GHz 500GB 4GB 15.6"" (1366x768) DVD-RW BT WIN7/8 Pro Webcam BLACK Screen Size: 15.6" 1366x768 LCD with AMD Integrated Graphics Processor Type: AMD A series A10-5750M( Quad-Core) / 2.5 GHz Max Turbo Speed: 3.5 GHz, Cache: L2 - 4 MB Standard Memory: 4 GB, Max support 16GB, Hard Drive Size: 500 GB CDRW/DVDRW, 802.11bgn wireless, 1Gb Ethernet, UltraNav, Camera, 6c Li-Ion, Operating System: Microsoft Windows 7 Professional 64-bit Edition / Windows 8 Pro 64-bit Edition downgrade