Synology QC2GhzCPU/4Gb(upto8)/RAID0,1,10,5,6/up to 4hot plug HDDs SATA(3,5' or 2,5')(up to 9 with DX517)/2xUSB3.0/2GigEth/iSCSI/2xIPcam(up to 40)/1xPS/3YW (repl DS918+)
Synology QC2GhzCPU/4Gb(upto8)/RAID0,1,10,5,6/up to 4hot plug HDDs SATA(3,5' or 2,5')(up to 9 with DX517)/2xUSB3.0/2GigEth/iSCSI/2xIPcam(up to 40)/1xPS/3YW (repl DS918+)