10 Gigabit Dual RJ45 port PCI Express 3.0 x8 adapter IEEE 802.3an 10Gbps Ethernet / IEEE 802.3bz 2.5Gbps/ 5Gbps Ethernet / IEEE 802.3ab Gigabit Ethernet / IEEE 802.3u Fast Ethernet / IEEE 802.3x Flow Control *DSM version requirement: 6.2.1-23824 or later version Supported models FS6400, FS3600, FS3400, FS3017, FS2017, FS1018, SA3600, SA3400, SA3200D, UC3200, RS4021xs+, RS3621xs+, RS3621RPxs, RS2821RP+, RS2421RP+, RS2421+, RS1221RP+, RS1221+, DS3622xs+, DS2422+, DS1821+, DS1621xs+, DS1621+, RS820RP+, RS820+, RS1619xs+, RS1219+, DS2419+, DS1819+, RS3618xs, RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS3018xs, DS1618+, RS18017xs+, RS4017xs+, RS3617xs+, RS3617RPxs, RS3617xs, DS3617xs, DS1817+, DS1517+, RS18016xs+, RC18015xs+, DS3615xs, RS3614xs+, RS3614RPxs, RS3614xs, RS10613xs+, RS3413xs+, RS3412RPxs, RS3412xs, DS3612xs, RS3411RPxs, RS3411xs, DS3611xs