Asking to see if anyone is having the same issue. I have a r9 290 and am using all the ports to drive 4 screens. I am only able to get the pixel format option for 2 out of the 4 ports no matter what screen is plugged into what port. I have move screens around between all the ports, swapped out cables even tried multiple display port to hdmi cables and I have had zero luck. I have down graded to 15.x drivers and gone up through various versions to current driver set and have had zero luck.
If anyone else has run into this can you please let me know if there is a fix or if this is a limitation of the hardware?