Onboard graphics controller

[Rodzilla]

Hi I have two moniters hooked up to my graphics card using hdmi and dvi I got a third moniter and I'm connecting to my cpu via vga but when I go into my bios to enable onboard graphics controller it's blanked out I have a radeon 7750 saphire low profile video card my cpu is intel core i3 and me desktop is a acer veriton x490 g

 

[carnageX]

Usually you can't hook up to both dedicated GPU as well as integrated GPU. It's one or the other, unless your board was AMD and you had an AMD CPU w/ graphics built in.