Seems reasonably decent gear. You didn’t mention, but first try the free stuff? It might be a case that you need to update BIOS and other firmware and software (radeon boost)?
After update to latest bios, you could also try a 2nd DDR4 to run dual channel and see if that helps. Hopefully your existing stick is max clock speed for the processor.
Otherwise, yep probably option 1!
Politics is big on instances like ‘world’ (which, despite the name, seems very US-centric), but others I have an account on its less of a thing.