Reference-design AMD Radeon RX 7900 XTX and RX 7900 XT graphics cards come with USB type-C ports on the cards that offer DisplayPort 2.1 passthrough and USB power delivery up to PD 3.0 standards of 30 W. While the port doesn't push USB data, it has wiring for DisplayPort and power delivery, letting you connect certain kinds of monitors that use a single USB-C connection for both display input and power. AMD just disabled the latter functionality of this port.

The AMD Software Adrenalin 25.10.2 WHQL drivers apparently disable USB power delivery from this port on reference-design RX 7900 XTX and RX 7900 XT graphics cards. The port continues to provide DisplayPort passthrough, but without power delivery, so your USB monitor might need its power brick plugged in, or to use a USB power delivery shunt. Those for whom this is a dealbreaker are recommended by AMD to switch back to AMD drivers as old as 25.3.1 to reliably use USB-PD from this port.