The D-Link DXE-820T Dual Port 10GBASE-T RJ-45 PCI Express Adapter is a high performance adapter designed for the high-speed PCI Express bus architecture. The Dual Port 10GBASE-T RJ-45 PCI Express Adapter offers increased bandwidth, reliability, and more functionality than standard PCI network cards. It is specifically designed to allow throughput at rates up to 40 Gbps, thus eliminating the bottleneck that exists with current 32 and 64-bit PCI bus architectures.