The Synology D4EU01 DDR4 ECC UDIMM Memory Module is a high-quality memory upgrade designed specifically for compatible Synology RackStation and DiskStation NAS systems, available in 8GB (D4EU01-8G) and 16GB (D4EU01-16G) capacities. These 288-pin unbuffered DIMMs feature DDR4 RAM with Error-Correcting Code (ECC) technology to detect and correct memory errors, ensuring data integrity and system stability for mission-critical applications. Operating at 1.2V for energy efficiency, these genuine Synology ECC memory modules enhance NAS performance for demanding workloads including virtualization, large-scale file sharing, surveillance management, and multi-user environments. ECC memory is essential for enterprise applications where data accuracy and system reliability are paramount. Compatible with multiple Synology models including RS2423RP+, RS2423+, RS2825RP+, and other select RackStation and DiskStation systems, these memory modules are rigorously tested to ensure optimum compatibility, reliability, and performance, backed by a 5-year warranty.