I would guess that the Nouveau driver does not support the Nvidia Geforce 10 series yet. You would have to edit the kernel command line on the boot menu and add nouveau.modeset=0.
That is, when you're presented with a list of options asking whether you want to start the live session or do something else, highlight the option you want and then press 'e' (or it might be different key; I'm not totally sure). This will enable you to edit the kernel command line and you can add nouveau.modeset=0 or nouveau.blacklist=1. Then continue to boot.