Onboard and Discrete graphics on one monitor

[gtq521]

I have a desktop with an i5 4690 with integrated graphics as well as a GTX 970. I also have an old i7 laptop with an Nvidia chipset. On the laptop, it would switch back and forth between the onboard graphics and graphics card to save battery/create less heat. I have tried to google how to do that on my desktop. I can only find help for setting up a multi-monitor setup. I just want to do this on one display. I figure it might eat up less power/generate less heat/extend the life of the graphics card (cuz I can hear the fans spin up when I'm running intensive games). I have an MSI Z97 Gaming 5 motherboard if that helps. I only have 1 display, a BENQ XL2411 connected to the graphics card through DVI. Would connecting to the video card port on the motherboard help? Basically I only want my 970 to run when I'm playing games rather than powering basic Windows and browsing the web.

 

[popatim]

You cant do what you want.
Mainstream desktop boards are just not designed for that. There are some all-in-one type boards that can do that but those are usually laptop boards and don't take regular desktop GPU's either.