Brand: DellRange: OptiplexModel: 790Format: SFF (Small form factor) Processor: Intel Pentium G840 2.8GHz - DMI: 5GT / s - Cache: 3MB - Socket 1155 RAM: 4Go - DDR3 (16 Go max) Hard disk: 480Go SSDOptical drive : DVD playerGraphic controller: Integrated into the processor - Intel® HD GraphicsNetwork: Intel® 82579LM Gigabit + WIFI USB stickSound card: Realtek ALC269Q High Definition Audio CodecChipset: Intel Q65 Express ChipsetDimensions: Height: 29 cm // Width: 9 cm // Length: 31 cm (standing tower) Operating system: Windows 7 Professional 64 Bits PORTS - 10 x Hi-Speed ​​USB - 4-pin USB, type A (4 front, 6 rear) - 2 x PS / 2 - Mouse and Keyboard- 1 x RS-232 Serial Port - D-Sub (DB-9) 9-pin- 1 x VGA - HD D-Sub (HD-15) 15-pin- 1 x DisplayPort- 1 x Gigabit Ethernet port - 1 x Audio (Jack 3.5mm) - 1 x Line Input - 1 x Headphones - 1 x Microphone SLOTS 4 x RAM slots 3 x Serial ATA (SATA) 1 x PCI-Express x16 (Slim) 1 x PCI-Express x16 x4 speed (Slim) System Operating Instructions installed + Stickers List of Compatible Processors (non-exhaustive) Intel Quad Core Processor Intel® Core i7 2600 / 3.40GHz, 8M, VTIntel® Core i7 2500 / 3.30GHz, 6M, VTIntel® Core i5 2400 / 3.10GHz, 6M, VTIntel Dual Core Processor Intel® Core i3 2120 / 3.30GHz, 3M, VTIntel® Core i3 2100 / 3.10GHz, 3M, VTIntel Pentium Processor (after July 2011) IPP G850 SANDY BRIDGE Q 3MB 2c FCLGA 2.9GHz 65W HD GRAPHICS 2000 QSIPP G840 SANDY BRIDGE Q 3MB 2c FCLGA 2.8GHZ 65W HD GRAPHICS 2000 QSIPP G620 SANDY BRIDGE Q 3MB 2c FCLGA 2.6GHZ 65W HD GRAPHICS 2000 QS USB WIFI key included! Delivered alone (without mouse, keyboard, screen, cables, etc.)))))))))Operation installed + Stickers List of Compatible Processors (non-exhaustive) Intel Quad Core Processor Intel® Core i7 2600 / 3.40GHz, 8M, VTIntel® Core i7 2500 / 3.30GHz, 6M, VTIntel® Core i5 2400 / 3.10GHz, 6M, VTIntel Dual Core ProcessorIntel® Core i3 2120 / 3.30GHz, 3M, VTIntel® Core i3 2100 / 3.10GHz, 3M, VTIntel Pentium Processor (after July 2011) IPP G850 SANDY BRIDGE Q 3MB 2c FCLGA 2.9GHz 65W HD GRAPHICS 2000 QSIPP G840 SANDY BRIDGE Q 3MB 2c FCLGA 2.8GHZ 65W HD GRAPHICS 2000 QSIPP G620 SANDY BRIDGE Q 3MB 2c FCLGA 2.6GHZ 65W HD GRAPHICS 2000 QS USB WIFI key included! Delivered alone (without mouse, keyboard, screen, cables, etc.)Operation installed + Stickers List of Compatible Processors (non-exhaustive) Intel Quad Core Processor Intel® Core i7 2600 / 3.40GHz, 8M, VTIntel® Core i7 2500 / 3.30GHz, 6M, VTIntel® Core i5 2400 / 3.10GHz, 6M, VTIntel Dual Core ProcessorIntel® Core i3 2120 / 3.30GHz, 3M, VTIntel® Core i3 2100 / 3.10GHz, 3M, VTIntel Pentium Processor (after July 2011) IPP G850 SANDY BRIDGE Q 3MB 2c FCLGA 2.9GHz 65W HD GRAPHICS 2000 QSIPP G840 SANDY BRIDGE Q 3MB 2c FCLGA 2.8GHZ 65W HD GRAPHICS 2000 QSIPP G620 SANDY BRIDGE Q 3MB 2c FCLGA 2.6GHZ 65W HD GRAPHICS 2000 QS USB WIFI key included! Delivered alone (without mouse, keyboard, screen, cables, etc.)VTIntel® Core i3 2100 / 3.10GHz, 3M, VTIntel Pentium Processor (after July 2011) IPP G850 SANDY BRIDGE Q 3MB 2c FCLGA 2.9GHz 65W HD GRAPHICS 2000 QSIPP G840 SANDY BRIDGE Q 3MB 2c FCLGA 2.8GHZ 65W HD GRAPHICS 2000 QSIPP BRIDGE Q 3MB 2c FCLGA 2.6GHZ 65W HD GRAPHICS 2000 QS USB WIFI key included! Delivered alone (without mouse, keyboard, screen, cables, etc.)VTIntel® Core i3 2100 / 3.10GHz, 3M, VTIntel Pentium Processor (after July 2011) IPP G850 SANDY BRIDGE Q 3MB 2c FCLGA 2.9GHz 65W HD GRAPHICS 2000 QSIPP G840 SANDY BRIDGE Q 3MB 2c FCLGA 2.8GHZ 65W HD GRAPHICS 2000 QSIPP BRIDGE Q 3MB 2c FCLGA 2.6GHZ 65W HD GRAPHICS 2000 QS USB WIFI key included! Delivered alone (without mouse, keyboard, screen, cables, etc.)