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Timetec Hynix IC 4GB for Synology NAS DiskStation DS218+ DS718+ DS918+ DS418play DDR3/ DDR3L 1866Mhz PC3L-14900 1.35V Non-ECC Unbuffered 204 Pin SODIMM Memory RAM(Equivalent to Synology D3NS1866L-4G) - Newegg.com
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Arch Memory AM-D3NS1866L-4G 4GB 204-Pin DDR3L 1866 MHz So-dimm RAM for Synology NAS Systems DiskStation DS718+ at Amazon.com
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