Dell OptiPlex 390 MT Core i3-2120 3.30GHz 8GB 250GB DVD-ROM WINDOWS 7 PRO 64-Bit HD6450 Processor: Intel Core i3-2120 3.30GHz; 2 Cores, 4 Threads; 3MB L3 Cache; Memory: 8GB DDR3 Installed; Hard Drive: 250GB 3.5" SATA Operating System: Windows 7 Professional 64-Bit Installed with Recovery / Reinstallation Partition and Certificate Of Authenticity; Optical Storage: CD/DVD-ROM; Power Supply: 265 Watt Graphics: ATI Radeon HD6450 PCI-E Video Card 1GB; 1 DVI, 1 DisplayPort; Audio: Integrated HD Audio Controller; Communication: Integrated Gigabit Ethernet Controller 10/100/1000 Front I/O Ports: 2 USB 2.0, 1 Headphone / Audio Out, 1 Microphone / Audio In Rear I/O Ports: 6 USB 2.0, 1 HDMI (disabled by installed video card), 1 VGA (disabled by installed video card), 1 DisplayPort (on installed video card), 1 DVI (on installed video card), 2 Audio In, 1 Audio Out, 1 Ethernet (RJ-45)