Adding the PCIE USB-C card to your system might affect performance.
Adding the PCIE USB-C card to your system might affect performance.
the board doesn't have instructions for assigning lanes to specific locations. there are 16 lanes from the cpu socket to the pcie slot and 4 from the cpu socket to the m.2 slot, which is the standard layout for am4. i don’t see any mention of this in the page you referenced or in the user reports i found.
You're correct that AM4 is built with 16 lanes directly from the CPU to the PCIe slot and four dedicated lanes for the first M.2 slot, meaning the GPU should consistently run at x16. I brought it up because certain budget ASRock boards, such as some HDV4 revisions, have been noted to lower the GPU to x8 when the Ultra M.2 is installed. This isn't a general rule but rather an issue with specific models. So yes, from an architectural standpoint AM4 functions properly, though real-world variations exist.