Lenovo ThinkPad T550 20CK000FUS 15.6" i5-5300U 4GB 500GB HDD HD Win 7 Pro Laptop Computer Processor: Intel Core i5-5300U Dual Core Processor (3M, 2.3GHz - 2.7GHz) 15W Hard Drive: 500GB 7200rpm Hard Disk Drive RAM: 4GB DDR3 1600MHz 1.35V