Get back boot screen with GTX 950 on Mac Pro 3,1?

[boovish]

I thought I saw something on how to do it before, but I can't find it. How do i get back the boot screen as well as startup disk chooser. I'm running OS X El Capitan

 

[pkcable]

Maybe this support page can help?

https://support.apple.com/kb/PH21908?locale=en_US

 

[boovish]

That's what's not working, since I'm not using a "supported" graphics card the boot screen is only black, and since I use bootcamp it's a pain to constantly swap out GPUs in order to get back to Mac OS X

 

[pkcable]

Ok you've gone above my paygrade sorry.

 

[boovish]

That's fine. It's not that hard to swap out cards, just somewhat annoying