@kkarhan@infosec.space@notthatdelta depends on the #UEFI and the way it works.
#iGPU|s from #Intel usually start with something preallocated up to 1,75 GB but can allocate as much as 64GB...
IDK how #AMD does that, but I assume you have booted into #legacy / #BIOS / #CSM mode so it'll only give out ~ 3,5GiB assuming it's #WindowsXP you want to run or any other #32bit OS...