Dell Precision T5400 Workstation Tower ( Intel Xeon 2X Quad Core  2.0GHz processor, 16GB DDR2 RAM, WiFi, Dual Video Output, DVD-RW, Microsoft Windows 7 Professional 64-Bit) Dell Precision T5400 Workstation Tower computer with 90 Day Warranty comes with 2 x Quad Core Intel Xeon 2.0GHz, Processeor, 16GB DDR2 Memory, DVD-RW Optical Drive - Microsoft Windows 7 Professional 64-bit Model: Precision T5400 T - Included items: Keyboard, Mouse, Power Cord, and Restore DVD - Power Supply: 875W - System Dimensions: 17.6 inches high x 6.8 inches wide x 18.4 inches deep - System weight: 39 pounds Software Installed - Windows 7 Professional 64-BIT with a Operating System Disk for easy re-installation. Graphics: Dual VGA Video Audio: Integrated High Definition audio - Networking: Integrated Broadcom Gigabit Ethernet 10/100/1000 Mbps Bays: 1(available)/2(total)External 5.25-inch, 0(available)/1(total) External 3.5-inch, 2 internal 3.5-inch (HDD) - Slots: 2 PCIe x16 slots wired as x8 (half length), 2 PCIe x16 Gen 2 graphics slots, 1 PCI-X slot, 1 PCI slot - Ports: 8 USB 2.0 (2 front, 6 back), 1 parallel port, 1 serial port, 2 PS/2, 1 RJ-45, 1 eSATA, Microphone, Headphone, Stereo line-in and line-out