Lenovo ThinkStation S20, ThinkStation. Processor clock speed: 2660 MHz, Processor family: Intel Xeon, Processor model: W3520. Internal memory: 6144 MB, Internal memory type: DDR3, Maximum internal memory: 12 GB. Hard drive capacity: 250 GB, Hard drive interface: Serial ATA. Optical drive type: DVD±RW. Audio system: ADI 1988 A