Lenovo E31, ThinkStation. Processor clock speed: 3400 MHz, Processor family: Intel Core i7, Processor model: i7-3770. Internal memory: 4096 MB, Internal memory type: DDR3, Memory slots: 4x DIMM. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA. Graphic adapter: Quadro 400, Maximum graphic adapter memory: 512 MB, Graphics adapter family: NVIDIA. Optical drive type: DVD-RW