Dell OptiPlex 980 SFF CORE i5-650 3.20GHz 4GB 250GB DVD+/-RW WINDOWS 7 PRO 64-bit Processor: Intel Core i5-650 Dual Core 3.20GHz, HT, Turbo Boost, 4M, VT-x, VT-d, TXT (vPro); Memory: 4Gb DDR3; Hard Drive: 250gb SATA Operating System: Microsoft Windows 7 Pro 64-Bit with Certificate of Authenticity (Recovery Partition on Hard Drive); Optical Drive: CD/DVD-RW; Power supply: 235W Graphics: Intel Graphics Media Accelerator; Audio: Integrated High Definition Audio; Networking: Integrated 10/100/1000 Ethernet Expansion Bays: (1) Internal 3.5", (1) External 3.5" (Slimline), (1) External 5.25" (Slimline); Slots: (1) Low-Profile PCIe X16, (1) Low-Profile PCIe x2 Ports: 8 x USB 2.0, 1 x VGA, 2 x 3.5mm Audio Line-In, 2 x 3.5mm Audio Line-Out 1 x Ethernet (RJ-45), 1 x Parallel, 1 x Serial, 1 x Display Port, 1 x eSata