Lenovo ThinkSystem ST650 Tower Server Bundle with Microsoft Windows Server 2016 Standard Operating System with industry leading reliability and performance made for Small Business Server roles Collaborate and grow as you scale - the ThinkSystem ST650 is your reliable, easy to manage, and scalable dual socket server that helps you share and connect quickly across your organization to drive business results Get powerful performance with Dual Intel Xeon Silver 4309Y processors with turbo up to 3.60GHz Turbo Speed, quality and reliability with 128GB DDR4 unbuffered memory; store plenty of data with 2TB SSDs for ultra fast storage and 24TB SATA hard drives for high capacity storage Keep your data safe with software RAID; Microsoft Windows Server 2019 Standard Retail Operating System