10 bits video card

Dumb question. but the list is so quiet. I have a GeForce 1070 video card in my Win10 PC. In Photoshop 2019, under Preferences > Performance, I find GPU options. And under those options, there is a "30 bits display" option. Is that what I think it is? I don't dare activate it in case I blow my machine up. But, really, 10 bits per channel display? Instead of the traditional 8 bits? I suppose Photoshop would never display such an option *if* the video card did not support this. Best / Roger Breton www.graxx.ca