Lenovo ThinkCentre M93z 10AE-S02300 All-in-One Desktop - Intel Core i5-4570S 2.9 GHz - 23.0" FHD - 4GB RAM - 500GB HHD-Windows 8.1 Professional 64 Processor: Intel Core i5-4570S Processor (4 cores / 4 threads, 2.9GHz, 6MB cache) Operating system: Windows 8.1 Professional 64 - English Display: 23.0" Full HD (1920 x 1080) TFT color, LED backlight w/ 2.0MP Camera Memory: 4 GB PC3-12800 DDR3 SDRAM 1600MHz SODIMM Memory Hard Drive: 500GB, 7200RPM Serial ATA 3.5" Hard Drive