Lenovo Thinkcentre M91p Black SFF Slim Form Factor PC - Intel 2nd Generation i7-2600 Quad Core 3.40ghz CPU with 3.8GHz Max Turbo 8MB/L3-Cache, 4GB DDR3-1333 (Max 16gb), 500GB SATA 7200RPM HDD , DVD+/-RW/RAM Drive, 8-USB2.0, 10/100/1000, Intel HD Graphics, VGA Port, Display Port, Serial Port, Raid 0/1, Wired Keyboard and Mouse, Windows 7 Professional 64-Bit 4480B3U Intel Core i7-2600 Quad-core 3.4GHz (3.8GHz Turbo Boost) processor for optimal performance. | Intel vPro. | Intel HD 2000 Graphics; enhances your system's graphics performance. 4 GB of DDR3 memory; enhances your multitasking capabilities. | 500GB HDD; accommodates lots of files and documents. | Intergrated SuperMulti DVDRW Dual Layer Optical Drive Windows 7 Professional 64-Bit Edition Operating System | Display Port | VGA Port | Included: USB Mouse & Keyboard | Gigabit Ethernet | USB 2.0 ports | RJ-45 Ethernet Port | Intergrated Realtek ALC662 High Definition Audio