Asus graphics card mem. Change in bios

[Edool14]

I have a Asus N53SV and I can't seem to find my graphics tab in my bios as I want to change the memory from ram to vram, I know I have 12gb memory and 1.5gb video ram but I want to change 4gb into vram (I know about shared system memory already btw), I have a GT 540m 2gb and I am already running Fallout 4 at 15-25fps and occasionally at 30fps (sort of recently now) but I wanted more vram to at least increase a bit. Thnx.

 

[rgd1101]

you can't change it.