Synology RS3617RPxs Diskless System NAS RackStation Port RJ-45: 4 x 10/100/1000M Port USB: 2 x USB3.0 HDD Interface: 12 x 3.5 or 2.5 SATA 6Gb/s (hard drives not included) Processor: Intel Xeon D-1521 quad-core 2.4 GHz burst up to 2.7 GHz Default/ Max. Memory: 8GB DDR4-2133 ECC UDIMM (expandable up to 64GB) Supported Protocols: SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN, L2TP) Power: AC input power voltage: 100V to 240V Power frequency: 50Hz to 60Hz, single phase Temperature: Operating temperature: 5 degree C to 35 degree C (40 degree F to 95 degree F) Storage temperature: -20 degree C to 60 degree C (-5 degree F to 140 degree F)