How can I stop the Vega 8 onboard graphics gobbling up a quarter of the RAM this laptop came with? It's not exactly fit for purpose as a gaming laptop when it only has 6GB of usable RAM. Bit disappointing to say the least.

I've had a look through the options in Armoury Crate and I've tried installing Radeon software to see if there's a way to tweak the RAM usage. BIOS doesn't seem to have anything tweakable either.

Any suggestions?