I have been running undervolted Sapphire Pulse RX 570 @ 1,025V (phase 4-7) on previous Radeon software versions without any problems with power consumption at 115W max under load out of its default 135W TDP. However on the latest sw version wattage hits TDP constantly and card isnt even able to hold its boost clock (nonOCd 1284MHz) steadily, while voltage appears to be set down properly just like before.
