MSI THUNDERBOLTM4 8K PCI-E 3.0 x4 Add-on Card, 2 x Thunderbolt 4 (USB-C) ports, 2 x DisplayPort input ports, Supports up to 8K display (need to connect the DisplayPort of the motherboard or discrete graphics card to the DisplayPort input ports of the THUNDERBOLTM4 8K card), Each Thunderbolt 4 (USB-C) port can daisy-chain up to three Thunderbolt 4 devices or five Thunderbolt 3 devices