Manually download the for your GPU from the manufacturer’s website:
Common errors associated with low VRAM during update:
Updating drivers ensures your GPU manages its existing memory as efficiently as possible. Intel Driver & Support Assistant AMD Auto-Detect Tool GeForce Experience NVIDIA Driver Downloads
This is the most effective way to change your allocated VRAM.
Since VRAM is a hardware component, it cannot simply be "downloaded." However, you can often via the BIOS settings, or trick software into seeing more via Registry edits.
Look for , DVMT Pre-Allocated , or Video Memory Size .