DS918+ 4-Bay NAS vs DS1517+ 5-Bay NAS – Which Synology should you Buy? Synology DS918+ and DS1517+ are both equally powerful NAS models. DS918+ is made with multimedia capabilities whereas DS1517+ comes with a focus on basic NAS functions.  Gen2 x8 slot (x4 link) lets you add 10GbE or cache card to massively increase IOPS of […]