I have noticed with the latest builds I can no longer undervolt my rx470’s, the miner fails to start and the only way I can mine is by removing the voltage values.
Currently I am trying to setup another rig with some older 4GB rx470s to mine etc with the hardfork. I used to be able to run these cards at 800-850mV brining the power draw down below 60w.
It is just very basic, but as I said this worked before. It is only the newer updates that no longer work with these settings, the ones that have removed wolfamdctrl