How do i know if my computer is using integrated gpu of the processor or the gpu of my graphics card? or both?

[xXPIXELXx]

My computer has intel core i7 4790k and this processor has intel hd graphics 4600 but i also have a nvidia gtx 970, which gpu my computer uses? both?

 

[learningbitbybit]

It depends on what you have selected. You can check that by going to Computer --> System Properties --> Device Manager --> Displays

That will tell you what graphics you are using.

 

[renz496]

If you connect your monitor to the discrete gpu it will use discrete gpu. By default.