Intel® Pentium® Intel Pentium G DELL OptiPlex 390 DT, 2.7 GHz, Intel Pentium G, 2 GB, 250 GB, DVD Super Multi DL, Windows 7 Professional DELL OptiPlex 390 DT. Processor frequency: 2.7 GHz, Processor family: Intel Pentium G, Processor model: G630. Internal memory: 2 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Total storage capacity: 250 GB, Optical drive type: DVD Super Multi DL. On-board graphics card model: Intel® HD Graphics. Operating system installed: Windows 7 Professional, Operating system architecture: 64-bit. Power supply: 250 W. Chassis type: Desktop. Product type: PC. Product colour: Black