This only works when you have a dedicated graphics card (IGPs use system RAM) with dedicated VRAM (some dedicated notebook chips also use system RAM), which is also not needed for anything else (which is what you usually buy a graphics card &#x2F; GPGPU acceleration card for).<p>That&#x27;s a so negligible minority of devices (underutilized gaming rigs and nothing else) that OSes just don&#x27;t bother.