The 256M is not the video RAM - it's a frame buffer.  The system allocates main RAM to video as needed - that is something you cannot adjust manually.

This isn't a gaming system of any caliber -- if the games are choppy, cut back on the video effects.  The GPU is not a particularly capable one - it's a mainstream multimedia GPU - not a gaming GPU.

I have my frame buffer set to 2gb. You can change this setting by hitting f12 and going into the boot menu (weird I know). This laptop can game just fine but it has unnecessary throttling issues that drop my FPS in PUBG to under 30, down from 40-50. Temps are fine its a bug in the BIOS that needs to be resolved. I hope they fix it, this is a great little machine and vega 10 graphics are just fine for 30+ FPS low settings gaming.

After I enter boot menu by hitting F12 then how can I vhange the settings?

Franteeko, many thanks!

The F12 menu helped me to reduce the amount of shared RAM in an Inspiron 3585 (2500U CPU). There are some useful settings in this menu as well.

Hello, could you please explain in detail how you managed to do this? I have installed 32GB in my Inspiron 7375 and was looking to set my Memory for the GPU to 2GB and found your post and pressed F12 at boot but could not see an option to change it.