I just got done with a bit of testing on my Radeon VII. I can confirm XMR V7 & V8 can be pushed to 2700-2800h/s (can be pushed near 3k if you have a well binned card that can undervolt better than mines) using SRBMiner. ETH my card can hit 93Mh/s. So far this card is very meh for mining. I would still go with vega 56s for cryptonight and polaris cards for ETH.
Are you talking about a stock Vega 56, or one modded to a 64?
When it comes to mining you should always asume modded. My V56s can do 2050H/s @ 165W at the wall. My VII does 2800H/s @ ~230W or so. Not worth it in my opinion. I'll keep my V56/64 farm going. If they drop to around 500 USD then yea I'd go for it but with limited supply and @ 700USD it's very meh imo.
Image below incase anyone wants to see the rates.
