OS: Windows 7 Professional (64-bit) Software: Microsoft Office Starter 2010* Processor: Intel Core i7-860 Processor (8MB Intel Smart Cache, 2.80GHz) Memory: 4GB (2/2/0/0) DDR3 SDRAM Storage: 1TB SATA hard drive, 7200RPM; Super-Multi drive Graphics: Discrete ATI Radeon HD 5450 PRO Communications: Gigabit LAN Also available in custom configurations with a choice of these features: windows operating system Intel Core i7, i5 or i3 Processor with or without Intel vPro Technology (Intel vPro Technology supported on Intel Core i7-7xx quad-core and Intel Core? i5-6xx dual-core processors) Up to 1TB4 SATA hard drive ? Super-Multi drive or DVD-ROM drive ? Integrated Intel HD Graphics or discrete ATI Radeon HD 5450 PRO graphics Gigabit LAN Intel Q57 Express chipset Four dual-channel memory slots: user upgradeable up to 16GB DDR3 SDRAM (one 4GB memory card in each slot)1 Interface ports: serial, RJ-45 LAN, VGA, headphones, microphone, DVI-D, two PS/2 , three audio, ten USB 2.0 (four front, six back) 7.1" (180.0mm) W x 17.3" (440.0mm) D x 13.9" (352.0mm) H 300W or 500W power supply Drive bays: six 3.5" (two external, four internal), two 5.25" Expansion slots: one PCI Express 2.0 x16, one PCI Express 2.0 x1, two PCI v2.3, optional parallel port connector EPEAT (Electronic Product Environmental Assessment Tool) Silver rating for VM688G models Black with silver chassis Three-year limited warranty with limited on-site service, three-year limited warranty with limited on-site service during first year or one-year limited warranty with limited on-site service