This XM-NA6821 with Intel X540-T2 controller chipset, dual 10Gbps Gigabit Ethernet PCI Express card, it is a high-performance Multi-Gigabit Ethernet card that supports the 10GBASE-T/5GBASE-T/ 2.5GBASE -T/1000BASE-T/100BASE-T.
This Adapter supports six speeds: 100Mbps and 1G/ 2.5G /5G/10G. Both Full/Low profile bracket are included, suitable for all PCs.