Mining with Claymore 11.4 - GPU 3 core voltage suddenly jumps for unknown reason

Hi folks.
I recently upgraded my rigs from Win 7 to Win 10, just to be able to mine ETH (again) since AMD driver compute mode only works with Win10.
After the upgrade I have had quite a few issues with Win 10. The most annoying thing is this.
I have two rigs with 4 cards each, both a mix of RX 470 and 570. The claymore ETH miner version 11.4 is great. All cards hashing away at 29-30MH/s no problem. All cards running at 1100/2000 core/mem frerq. After a while GPU 3 core voltage will jump from 856 mV to 1019 mV. The same happens on the other rig: again voltage goes from 887 to 1019 mV. WTF???
So those cards get really hot after a while. From 60c to 75c
I have to fiddle with Watttool to get the voltage setting back down to 800-voltage level. I tried OverDriveNtool - same behavior.
I suspect its a GPU driver issue, knowing the overall shittiness of AMD drivers. I am using Adrenalin 18.2.1 from Feb7.
If anyone already experienced this problem, then please share a solution. I am quite pissed as this sudden voltage jump threatens the health of my cards.

Topic: Mining with Claymore 11.4 - GPU 3 core voltage suddenly jumps for unknown reason (Read 181 times)