You could try opening Radeon Settings > System > Switchable Graphics, there you should see a grid of programs (recent ones or recently opened), if you recently opened skyrim it should show up in there skyrim.exe or something similar, if you find the executable of the game click on it and change its option to high performance to ensure the dedicated graphics card is being used for that game, restart the game and check if you got an improvement. Some games don't trigger high performance graphics sometimes, so if you have odd graphics performance check that you game isn't running in power save mode (aka using the Vega 8 integrated graphics).

Also as a fellow user of the same model, have you happened to notice problems with audio on this laptop? Like pops, crackle, small stutters while listening audio? I don't know if it is my laptop, all laptops, drivers, or windows. 

Hope this helped. 

anoxssj said:

I have got the same laptop and I can't run FIFA 19 smoothly on low settings at 1080p.I am running it on high performance (selected in the switchable graphics tab).
Are you guys also having similar performance or I am missing something?
Any help will be appreciated.
Put everything on max or ultra instead of low.works like a charm.when you put it on low it ribs on your internal. Put it on ultra and 1080p

place your hand on the back of the laptop near the vents and check is ample amount of air is blown out when nitro sense is at max .if not , then there is a high possibility that the vents are jammed . the nitro 5 model seems to have this big dis advantage f clogging air vents unfortunately.