I am building an X570 that has PCIe 4.0 I am installing a 2070 super which is 3.0. I am also adding a PCIe 4.0 riser

will I still be able use the M.2 as a PCIe 4.0 if I have a 3.0 graphics card. Or does the bios force me to commit to 3.0 because of the graphics card?