I run my rtx-3070's at 90watts, I get 50MH/sec
The card can handle 250watts, and I would get 55mh/sec, no thanks, I would rather run my card at 60C ( my ambient is 32c), and spend $10/month for electricity for the card, hell right now u only get what $2/day? So $60/mon I paying for $10 electricity, but if your running this card at 180watts, then your near a loss. Last month one RTX-3070 @ 90watts earned me $5/day, now $2, but as we all know ETH is going POS, so its game-over, time to move on
It seems that smth wrong with your arithmetic, or your GPUs. 3070 gives about 60-62 at 130Wt. 3080 uses 250Wt and it will give you about 90-100Mh, depends on model and configure.