10 Gigabit Single RJ45 port PCI Express 3.0 x8 adapter - Supports 10/5/2.5/1GbE connections - IEEE 802.3an 10GBASE-T 10 Gbps Ethernet / IEEE 802.3bz NBASE-T 2.5/5 Gbps Ethernet / IEEE 802.3ab 1000BASE-T 1 Gbps Ethernet / IEEE 802.3u 100BASE-TX Fast Ethernet / IEEE 802.3x Flow Control Supported models DS1522+, RS422+