I used to use afterburner to undervolt on blockchain driver.  Recently I updated to 18.2 drivers and now use overdriventool.  The only problem is that I can't undervolt the Asus rog strix rx570s.  Overdrive accepts the voltage and applies it.  But HWinfo shows a higher voltage.  No matter what I set the voltage to in overdrive or claymore command line, HWinfo always shows the same voltage for the rog rx570s.

Voltage control is fine on msi rx570 and on all 580s.

Any ideas?  Any other software that can apply a voltage offset like afterburner does?