Lenovo ThinkStation D20, ThinkStation. Processor clock speed: 2530 MHz, Processor family: Intel Xeon, Processor model: E5540. Internal memory: 4096 MB, Internal memory type: DDR3, Memory slots: 12x DIMM. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA, Serial ATA II, Hard drive rotational speed: 7200 RPM. Graphic adapter: Quadro FX 1800, Graphics adapter manufacturer: NVIDIA. Optical drive type: DVD-RW