ASUS ThunderboltEX 4 is an additional ThunderboltTM 4 card offering a two-way 40 Gbps bandwidth, USB4TM and DisplayPortTM 1.4 compatibility. It supports up to five Thunderbolt devices connected in series and allows charging laptops through USB-C® port up to 100 W. Product characteristics: Add-on card ThunderboltTM 4 with Intel® certification Two-way bandwidth 40 Gbps provides super fast data transfer and video output Double ThunderboltTM 4 (USB-C®) ports with up to five Thunderbolt devices in the chain DisplayPortTM 1.4 for 8K Ultra HD support