M Series desktops with up to genuine Windows 7 Professional OS & up to 3rd generation Intel Core i series processors or up to 2nd generation AMD Accelerated Processing Units (APUs) deliver responsive performance at breakneck speeds — making quick work of the most intensive applications. Plus, with the power of the latest integrated Intel HD graphics, if you need to blast through advanced video editing & 2D & 3D image design, M Series can oblige. New Think Centre M Series models are equipped with our exclusive Lenovo Enhanced Experience 3 for Windows 7 with Rapid Boot technology, which delivers faster boot time along with robust security features & superior web conferencing performance. & if thats not enough, Super Speed USB (Universal Serial Bus) 3.0 ports transfer files up to 10 times faster — especially useful when copying large media files. Plus, you can increase your power supply with the ability to charge external devices quickly. Processor Intel Core i 5-3470 3.2 G Hz Turbo Boost up to 3.6 G Hz 6MB (L3 Cache) Intel Q75 Express Chipset Memory 4GB 1600 M Hz DDR3 PC3-12800 Expandable to 32GB 4 x DIMM slot Hard Drive 500GB 7200rpm Optical Drive DVD±RW DL Software Operating system: Microsoft Windows 7 Professional (64-bit) Winodws 8 Recovery disc Display Not Included Graphics Intel HD – Integrated Input Devices USB (Universal Serial Bus) Keyboard & Mouse Networking LAN: Ethernet 10/100/1000 Mbps Warranty 3 Year Manufacturer Warranty