Well said @stormhawk and @Coinfarm ventures, efficiency will take over once mining profit isn't looking very good anymore, graphic cards like A2000, RTX 3 series and RX6 series will take over, the lower your power consumption the better your mining operation, as far as the profit is lower than power consumption you will be able to keep up.
One more important point: according to leaked rumored specs, the new Intel Arc Xe series, GreedForce RTX 4000 and Radeon RX 7000 series will NOT deliver more memory bandwidth per dollar or much less wattage per GB/s. This means the new gen will not be more efficient for mining memory-hard algos (Ethash, Autolykos, Octopus, ...) than the current generation of cards. It will only be 10-20% more power efficient per GB/s.The only buyers who will benefit from these cards will be gamers or if a core-intensive coin like RVN has a mining gold rush. So hold on to your existing cards.
