HP Pavilion Slimline s5220nl Desktop PC, Pavilion. Processor frequency: 2.5 GHz, Processor family: Intel Core 2 Quad, Processor model: Q8300. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM, Memory slots: 2x DIMM. Total storage capacity: 640 GB, Hard drive interface: Serial ATA II, Hard drive speed: 7200 RPM. Discrete graphics adapter model: NVIDIA GeForce G210, Maximum graphics adapter memory: 2303 MB. Operating system installed: Windows 7 Home Premium