I have an MSI Vega 56 reference and I bought an Asus strix vega56 gaming OC custom today. The MSI can be easily undervolten with wattman. If I use the Asus with the same settings as the MSI undervolt then the blockcain driver hangs up after about 60 minutes.
As a mainer I use xmr stack amd, I can not explain why it hangs under Win10.