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Memory RAM | 4GB - Synology DiskStation DS2015xs / DS2415+ / DS1815+ / DS1515+ - (OEM-# RAM1600DDR3-4GB) - 1600MHz, Unbuffered, 1,35V
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64GB & 32GB Synology DS1621xs+ NAS Memory Upgrade Test - Crucial and Kingston Unofficial Memory - YouTube
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