Dell OptiPlex 980 SFF CORE i7-870 2.93GHz 4GB 250GB DVD+/-RW WINDOWS 7 PRO 64-Bit HD4550 Processor: Intel Core i7-870 2.93GHz Quad Core; ( 4 cores, 8 threads); 8MB L3 Cache; Memory: 4GB DDR3 Installed; Hard Drive: 250GB SATA Front I/O Ports: 2 USB 2.0, 1 Headphone/Audio Out, 1 Microphone/Audio In Operating System: Genuine Dell Windows 7 Pro 64-Bit Installed with Certificate of Authenticity (Recovery Partition on Hard Drive); Optical Drive: CD/DVD+/-RW DL Super Combo; Power supply: 235W Rear I/O Ports: 6 USB 2.0, 1 eSATA, 1 DisplayPort (disabled by installed video card), 1 VGA (disabled by installed video card), 1 DisplayPort (on installed video card), 1 DVI (on installed video card), 1 Audio Out, 1 Audio In, 1 Ethernet (RJ-45), 1 Parallel, 1 Serial, 2 PS/2 Graphics: ATI Radeon HD 4550 512MB Video Card; 1 DisplayPort, 1 DVI; Audio: Integrated High Definition Audio; Networking: Integrated 10/100/1000 Ethernet