Lenovo IdeaCentre K305, 3 GHz, Intel® Pentium® 4, 6 GB, 640 GB, DVD Super Multi DL, Windows 7 Home Premium Lenovo IdeaCentre K305. Processor frequency: 3 GHz, Processor family: Intel® Pentium® 4, Processor model: 630. Internal memory: 6 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1066 MHz. Total storage capacity: 640 GB, Optical drive type: DVD Super Multi DL. Discrete graphics card model: NVIDIA® GeForce® GT 320. Operating system installed: Windows 7 Home Premium, Operating system architecture: 32-bit. Power supply: 280 W. Chassis type: Tower. Product type: PC. Product colour: Black