Hello,
When it comes to the maximum supported display modes for AMD CPUs, the information can sometimes be a bit challenging to find. However, I can provide you with some general guidance.
The AMD Ryzen 5700G, which features integrated graphics (Radeon Vega), should be capable of supporting 8K resolution at 60Hz. AMD's integrated GPUs have improved over the years and should have no problem handling 8K HDR content at that refresh rate.
Regarding the motherboard, the ASUS PRIME B550-PLUS, the HDMI 2.1 specification supports 8K resolution at 60Hz. However, it's important to note that the motherboard's specifications may mention HDMI 2.1 but still have limitations due to other factors such as the HDMI controller chip used. In some cases, the motherboard's implementation may not fully support the maximum capabilities of HDMI 2.1.
To ensure compatibility and performance, it's generally recommended to use a dedicated graphics card for high-resolution and HDR content. A discrete graphics card from AMD or NVIDIA that supports HDMI 2.1 would provide a more reliable and capable solution for displaying 8K HDR content at 60Hz.
If you're looking for specific technical specifications and details, I would suggest visiting the AMD and ASUS websites and checking the product pages for the Ryzen 5700G CPU and ASUS PRIME B550-PLUS motherboard. Additionally, you can reach out to their customer support for further assistance or clarification on the supported display modes.