Lenovo ThinkStation S20, ThinkStation. Processor clock speed: 3200 MHz, Processor family: Intel Xeon, Processor model: W3565. Internal memory: 6144 MB, Internal memory type: DDR3, Maximum internal memory: 12 GB. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Optical drive type: DVD-RW. Audio system: HD 7.1