Flexible scalability meeting growing needs Powered by a quad-core processor and AES-NI hardware encryption engine, DS718+ delivers excellent file transfer speeds. With the scalability to expand up to 7 drives with Synology Expansion Unit DX517 and the support for real-time 4K/1080p video transcoding, DS718+ is ideal for centralizing data backup and storing ultra-high definition media contents. CPU Quad-core burst up to 2.3GHz RAM options DDR3L 2GB, up to 6GB Encryption Performance Up to 226 MB/s reading and 184 MB/s writing Transcoding 2-channel 4K H.264/H.265 video transcoding Btrfs: Next generation storage efficiency Btrfs file s model : ADATA XPG SX6000 Lite 512GB PCIe 3D NAND PCIe Internal Solid State Drive tag : NAS