Feature: 16GB DDR4-2666 ECC Registered DIMM 288pin 1.2V Applied Models: FS6400, FS3400, SA3400 *All images and descriptions are for illustrative purposes only. Visual representation of the products may not be perfectly accurate. Product specification, functions and appearance may vary by models and differ from country to country . All specifications are subject to change without notice. Although we endeavor to present the most precise and comprehensive information at the time of publication, a small number of items may contain typography or photography errors. Products may not be available in all markets. We recommend you to check with sales for exact offers Product Type: RAM Module Device Supported: NAS Server Error Checking: ECC Number of Pins: 288-pin Signal Processing: Registered Product Type: RAM Module Compatibility: Synology NAS Servers: FS3400 FS6400 SA3400 Device Supported: NAS Server Error Checking: ECC Manufacturer Part Number: D4RD-2666-16G Number of Pins: 288-pin Signal Processing: Registered Form Factor: DIMM Memory Speed: 2666 MHz Form Factor: DIMM Manufacturer: Synology, Inc Memory Speed: 2666 MHz Product Name: 16GB DDR4 SDRAM Memory Module Memory Size: 16 GB Brand Name: Synology Memory Size: 16 GB Brand Name: Synology Memory Technology: DDR4 SDRAM Memory Technology: DDR4 SDRAM Memory Standard: DDR4-2666/PC4-21333 Memory Standard: DDR4-2666/PC4-21333