GTX 1080 and GTX 1070 in same PC?

[Oyeve]

I recently got my mitts on a GTX 1080 and a GTX 1070. The 1080 is obviously the faster card but I was wondering if I can install both cards in the same PC, NOT to SLI but just have them both in and switch them on the fly, like pop out the HDMI cable and pop it in the other. Any downsides? I have a 1K PSU so that should not be an issue.

 

[aigomorla]

I dont know if it still works, but you could run them synchronously.
When video cards lacked the plentiful output ports, i used to run 980GTX's in SLI + 550 GTX so i could get 3 monitors where primary focus was the SLI for gaming, and the other 2 were just additional real estate.

As for swaping on the fly, some boards allow you to disable pci-e slots.
As for software options, some games allow you to select which card for the game to render, and which monitor for it to display on.

I am 100% not sure however if the new nvidia drivers will allow something like this.

As for downsides, i dont see any.
Again people used to have a dedicated lower tier card just to run physx on, and that didn't hurt anything.