The networking world is going through some changes, after the 1GbE standard becoming a household name on motherboards, with 10GbE being too expensive to shift over.
ASUS is a company that makes high-end components and products, so it made sense that during their recent 'Outshine the Competition' event in Berlin, ASUS teased a new PCIe-based 10GbE adapter. The new ASUS ROG Areion is a 10GbE Ethernet adapter that has a huge heat sink, and plugs into a PCIe 3.0 x4 port.
The ROG Areion is also backwards compatible with slower networking standards, with 5GbE, 2.5GbE, 1GbE, and 100Mbps - but 10GbE is why we're all here... over 1GB/sec on your network is a huge deal for some people, especially content creators.