Amazon.com: A-Tech 4GB Module for QNAP ES1640dc Series NAS Servers - DDR3/DDR3L 1866MHz PC3-14900 Non-ECC SODIMM 1.35V Memory RAM (Replacement for QNAP RAM-4GDR3LA0-SO-1866) : מוצרי חשמל
Crucial 4GB Single DDR3/DDR3L 1866 MT/s (PC3-14900) Unbuffered SODIMM 204-Pin Memory - CT51264BF186DJ at Amazon.com
AddOn AA2133D4SR8S/8G x1 JEDEC Standard 8GB DDR4-2133MHz Unbuffered Single Rank x8 1.2V 260-pin CL15 SODIMM – Dihuni