AddOn 16GB DDR4 SDRAM Memory Module - For Server - 16 GB (1 x 16GB) - DDR4-2666/PC4-21300 DDR4 SDRAM - 2666 MHz Single-rank Memory - CL15 - 1.20 V - ECC - Unbuffered - 260-pin - SoDIMM - Lifetime Warranty

This Synology® D4ECSO-2666-16G Compatible 16GB DDR4-2666MHz Single Rank Unbuffered ECC 1.2V 260-pin CL17 SODIMM is 100% guaranteed to be compatible with your system and to work right the first time. Adding additional memory is the best way to increase the performance of your system. All our memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. Our products are also guaranteed by federal law to not affect or void OEM warranties.