I tried to connect 1 rx 470 with riser to the pcie x 16 slot but it pulls up integrated graphic radeon r3. In the bios I set primary video device to pcie video, but it still pulls up the r3 graphics. I also tried 1 rx 570 but had the same results.

The ASUS AM1M-A mb has a sephron ami apu.

Any ideas on how to get this board to recognize the gpu.