Quad-core CPU brings high performance Powered by a quad-core CPU running at 2.4 GHz, RS815+/RS815RP+ delivers average 389.03 MB/s reading and 361.33 MB/s writing. 1 With this superior performance and a RAM module expandable to 6GB (2GB by default), RS815+/RS815RP+ is a powerful 1U NAS server for mission-critical tasks of SMBs. Ideal encrypted data transmission with AES-NI RS815+/RS815RP+ features a hardware encryption engine, which offloads encryption calculation tasks away from the main CPU. That means files and folders are encrypted on the fly without compromising the performance delivering encrypted data transmission speeds over 388.66 MB/s reading and 158.9 MB/s writing. Robust scalability up to 8 drives When your data storage is nearing its limits, RS815+/RS815RP+ can be connected to a dedicated RX415 expansion unit 2 , letting you easily scale up to 8 drives for additional storage on the fly. With a RX415 connected through an eSATA cable with specially-designed locking connectors, raw capacity can be as high as 64TB. 3 Quad LAN ports for failover and Link Aggregation support To ensure your business continuity, RS815+/RS815RP+ features four built-in Gigabit LAN ports supporting failov model : ADATA XPG SX6000 Lite 512GB PCIe 3D NAND PCIe Internal Solid State Drive tag : NAS