Lenovo ThinkStation S20, ThinkStation. Processor clock speed: 2130 MHz, Processor family: Intel Xeon, Processor model: E5506. Internal memory: 3072 MB, Internal memory type: DDR3, Memory slots: 6x DIMM. Hard drive capacity: 250 GB, Hard drive interface: Serial ATA, Serial ATA II, Hard drive rotational speed: 7200 RPM. Graphic adapter: Quadro FX 1800, Graphics adapter manufacturer: NVIDIA, Maximum graphic adapter memory: 768 MB. Optical drive type: DVD-RW