HP Z420 Workstation HP Z420 600W 90% Efficient Chassis Intel® C602 Chipset Windows 7 Professional 64bit OS Intel Xeon E5-1620v2 3.7 10M 1866 4C CPU 8GB DDR3-1866 ECC (2x4GB) RAM NVIDIA Quadro K600 1GB Graphics HP 1TB SATA 7200 1st HDD HP USB Standard Keyboard HP USB Mouse HP 3/3/3 Warranty HP 16X DVD+-RW SuperMulti SATA 1st Drive HP Z22i 21.5-Inch IPS Monitor (WideScreen)