It would help if you actually added the SSDT's to your OC config.plist, not just the ACPI patches.
SSDT-HPET and SSDT-PLUG-ALT are both missing from the config.plist.
SSDT-PLUG-ALT replaces SSDT-CPUR, so remove the CPUR table.
Which CPU does your Mini PC system contain?
Which AMD IGPU does...