This ThinkCentre business desktop computer comes with an Intel Celeron 430 processor running at 1.8GHz. The 80GB SATA II hard drive has great speed and plenty of space to store your important files. The Lenovo ThinkCentre A57 9702B4U Desktop PC also has 512MB of DDR2-667 RAM standard, 1 slot available, and a DVD-ROM optical drive. It comes with state-of-the-art Intel GMA 3100 Graphics and powered by a 280 watt power supply. And all these components run with stability thanks to Microsoft's Windows Vista Basic operating system. This Lenovo ThinkCentre A57 9702B4U Desktop PC is ready to help you work efficiently.