Can I use my iGPU with a GPU installed?

[jonahcolor]

Hey guys. Jonahcolor here.

Currently I am dual booting Yosemite and Windows 10.
I have a GTX 970 and I use the Nvidia web drivers while using Yosemite. I want to upgrade to Nvidia's new "Pascal" generation of cards (either a 1060 or a 1070) but I am aware that there are currently no web drivers for this new gen of cards. I never use graphically intense software on Yosemite, and I used to use it without a graphics card at all, relying solely on my integrated graphics from my CPU.

So my question is this:
Can I have my computer set up so that when I boot to Yosemite, it uses the iGPU, and IGNORES the GPU? And when I boot to Windows, it uses it?

If so, how do I go about doing this.

I apologize if this is the wrong place for this, and I thank you for all of your help!!

 

[Fl0r!an]

This question comes up approx. twice a day in the Pascal GPU thread, so have a look there.
Most people use a HDMI or DP switch, because you'll have to attach your display to the GPU which is supposed to generate the video output.

 

[jonahcolor]

This question comes up approx. twice a day in the Pascal GPU thread, so have a look there.
Most people use a HDMI or DP switch, because you'll have to attach your display to the GPU which is supposed to generate the video output.

So it IS possible?

 

[Fl0r!an]

It is possible, but I wouldn't do it personally. I'd get a high-end Maxwell GPU, they've become quite cheap.

 

[jonahcolor]

It is possible, but I wouldn't do it personally. I'd get a high-end Maxwell GPU, they've become quite cheap.

Well I literally only use Yosemite for Pages and Logic Pro X. And the 1060 is an unrefusable price.