Fedora 25 has Wayland enabled by default. However, if your computer has a (good) Nvidia graphic card and want to make use of it, you’ll need to switch to Xorg and install the Nvidia proprietary driver.

Note that only the Nvidia driver with the version newer than 375.20 works on Fedora 25.

Ref: How do I install the Nvidia driver on Fedora 25?