Well this is the config for that particular card:
...
--gpu-vddc 1.025 \
...
Seems that your voltage is too low. Reference voltage for R9 290 is 1.140-1.180. Try a higher value in gpu-vddc parameter.
TBH I don't think that line is doing anything at all.
As I understand it, you can't adjust the voltage in Linux unless you modify the bios of the card.
This is purely a Windows parameter [citation needed]