This specification defined a high performance PCIe Ethernet adapter which provides single RJ-45 port for network connection of data rate up to 5Gbps. 

The PCIe Gen3 x1 interface enables running at maximum full duplex throughput as well as backward compatible with Gen1/2 PCIe slots. 

With this adapter, the network environment permits easy upgrade to 5Gbps network bandwidth over existing Cat 5E network cabling.

• PCIe Gen3 x1 form factor
• Supports standard and low profile systems
• Supports 5-speed 5G/2.5G/1G/100M/10Mbps auto negotiation
• Runs 5Gbps on Cat 5E cable up to 100m
• Supports Wake-On-LAN (WoL)
• Up to 16KB jumbo frame
• Checksum and TSO offload
• Network ARP and NS offload