Product DescriptionOfficial Synology DDR4 RAM module, 8GB capacity, 2666 MT/s, ECC, unbuffered. This memory upgrade is designed to enhance the performance and reliability of Synology NAS devices that support DDR4 ECC RAM. ECC (Error-Correcting Code) memory helps detect and correct single-bit errors, helping to protect data integrity in storage, virtualization, and multi-user environments. The D4EC-2666-8G module uses DDR4 SDRAM technology to deliver dependable performance with a compact DIMM form factor. With 8GB of capacity, it provides ample headroom for caching, databases, and memory-intensive applications. Please verify compatibility with your NAS model and firmware version before installation to ensure optimal results.Product Specification- Brand: Synology- Model: D4EC-2666-8G- Type: DDR4 ECC Unbuffered SDRAM- Capacity: 8GB- Speed: 2666 MT/s- Form factor: DIMM- ECC: Yes- Unbuffered: Yes- Modules: 1 x 8GB- Compatibility: Synology NAS devices that support DDR4 ECC memory- EAN: 4711174723522NoteThe product description and specification should be verified on the vendor's website to ensure the latest information.