Are/were there motherboards which allowed for complete disabling graphic cards by disabling PCI-E slots? I remember reading years ago about it: a physical switch next to the x16 slot which would allow to cut off current powering PCI-E slot and making it completely inactive / invisible for the system.
Virtu in new motherboards is not solving the problem entirely - it's just downclocking video card.
I use PC for 30% gaming and 70% browsing/music. I would be happy to have an option of switching the graphic card(s) before powering on the PC. And having that kind of switch on 3.5" bezel makes me wet