Later Model Dell 745 Optiplex with the Powerful Intel Pentium Dual Core 1.6 GHz running at 1.6 GHz x 2 Cores! Powerful PC capable of running Windows Vista and Windows 7. The OptiPlex platform is designed for business and individuals that are focused on affordable pricing coupled with top-level performance.This Dell 745 is a later model series running the Intel 1.6 GHz Pentium Dual Core x2 CPU, 2 GB DDR-2 High Performance Dual Interlaced Memory, 160GB Ultra Fast 7200 RPM SATA hard drive, CDRW/DVD SATA Ultra Speed Drive, Integrated LAN and Sound. The Dell GX745 provides the perfect blend of relevant technology that users demand, all at a price that won't bust the budget. This model also comes with Windows XP Professional installed.