HP TouchSmart 310-1125uk Desktop PC, TouchSmart. Processor clock speed: 2.5 GHz, Processor family: AMD Athlon II X3. Internal memory: 4 GB, Maximum internal memory: 8 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 750 GB, Hard drive rotational speed: 7200 RPM. Optical drive type: DVD Super Multi. Display diagonal: 508 mm (20 "), Display resolution: 1600 x 900 pixels