MAIN OVERVIEW FEATURES: Memory Size: 4 GBMemory Technology: DDR4 SDRAMMemory Voltage: 1.20 VMemory Speed: 2666 MHzMemory Standard: DDR4-2666/PC4-21333Error Checking: Non-ECCSignal Processing: UnbufferedDevice Supported: NAS ServerNumber of Pins: 288-pinForm Factor: DIMMCompatibility: Synology RackStation NAS Servers: RS2418+ RS2418RP+ RS2818RP+