Lenovo ThinkCentre 10AB000EUS Desktop Computer (Intel Core i5 i5-4570T 2.90 GHz, PCI/PCIe Tiny Form Factor) Business Black RAM: 4 GB (16 GB max), Hard Drive: 500 GB Intel HD Graphics 4600, Intel Core i5 (4th Gen) 4570T / 2.9 GHz, Intel vPro Technology Gigabit LAN, 802.11b, 802.11g, 802.11n Windows 8 Pro 64-bit/ 7 Professional 64-bit 3 year warranty