Not all boards have all those options.

If you try putting gpu1, 2 or 3 in place of gpu 0. Does only the gpu 0 still mine?

I would test each gpu as gpu0 make sure they all work.

Then lets talk about how they are connected?

Risers I assume?

You can also test each riser with the gpu0 and good gpu.

Let me know...if the gpus work its just a matter of figuring out why it doesnt see the others.

Oh and make sure not to connect a gpu/riser from 2 different psu.  I see you have 2.  So all connection of power to motherboard are off psu 1....and gpu also connected to psu 1 will need its riser powered by psu1.  gpus on risers are ok to power off psu2...but be sure the riser gets its power from psu2 also.  Assume a y-cable to sync the psus to start together.