Supporting up to twelve 3.5" HDDs and four 2.5" SSDs, the TS-1685 is a high-capacity, robust, and reliable business NAS powered by an Intel® Xeon® D processor. Designed to optimize enterprise IT infrastructure, the TS-1685 comes with three PCIe slots that support 10GbE/40GbE NIC, PCIe NVMe SSD, graphics cards, and USB 3.1 expansion cards. Incorporating security and scalability, the TS-1685 presents an ideal choice for a complete business-ready storage solution with cross-platform file sharing, comprehensive backup and disaster recovery, iSCSI & virtualization, and more business applications. NAS and iSCSI-SAN unified storage solution Built-in M.2 SATA 6Gb/s slots & 2.5" SSD slots Qtier technology and SSD caching enable 24/7 optimized storage efficiency 10GbE/40GbE-ready, highly-efficient storage solution for virtualization and intensive data transmission Supports virtualization, containerized apps, centralized storage, backup, sharing, and disaster recovery Q'center for centrally managing all of your NAS devices, and QRM+ as a centralized management solution for networked computing devices Qfiling enabling automated file organization, Qsirch full-text search engine, and QmailAgent for centralized email management Scalable up to 56 drive capacity with QNAP expansion enclosures Epic 16-bay high-capacity data center The TS-1685 supports up to 16 hard drives, providing the storage potential to be a high-capacity data center. Its high-quality hardware enables optimum performance to fulfill diversified application needs. Intel® Xeon® D processor, extraordinary performance The TS-1685 is powered by a high-performance Intel® Xeon® D multi-core processor with up to 128GB DDR4 RAM (comes preinstalled with 16GB/32GB/64GB/128GB RAM), delivering outstanding performance with up to 2,339 MB/s throughout to enhance the efficiency of CPU-demanding applications such as virtualization and large numbers of simultaneous connections.M.2 SATA 6Gb/s SSD & 2.5" SSD cache with Qtier optimization The TS-1685 provides four 2.5" SSD slots dedicated for caching to increase IOPS performance, and supports higher transfer speeds and reliability with optional six M.2 SATA 6Gb/s SSDs. Using an SSD cache boosts overall system performance, and is perfect for improving the overall workflow of random IOPS demanding applications such as virtualization. QNAP's Qtier Technology empowers the TS-1685 with Auto Tiering that further helps continuously optimize storage efficiency across M.2 SSD, SSD, high-capacity SATA drives, and the optional PCIe NVMe SSD with around-the-clock acceleration. Qtier now supports "On Demand Allocation Priority", providing customizable flexibility to arrange tiered storage suited for your system environments and application demands.Built-in 10GbE ports with 40GbE compatibility The TS-1685 offers not only four inbuilt Gigabit Ethernet ports but also two 10GBASE-T ports to fully support 10GbE high-speed networks, capable of delivering lightning-fast throughput for businesses that demand higher bandwidth for virtualization and fast backup & restoration for an ever-growing amount of data. The extra PCIe slots allow for installing optional 10GbE/ 40GbE network cards for flexible high-speed network deployment. Coupled with its large storage capacity potential, the 10GbE-ready TS-1685 is perfect for companies to store massive amounts of data and excel in fast data transmission.