Hi Sw
I guess unless you are running with that type of limited system you will not know.
In the GPU's Control Panel you may well have settings that can lower things like light shafts and shaders which are high end performance users.
In the Windows Control Panel
System
Performance
Settings
Performance Options
Visual Effects
You will probably see that Windows selects the default setting to take charge.
You have the option here to make preset changes or you can customize.
Also in the Advanced Tab is the option to run Programs or Background Services.
Peter