looks like nvidia 3080 is pretty good but a power hog.
mine do 94 and 91
or 185 at 530 watts measured on the wall with a kwatt meter.
i have some four card amd 5600 that do about 168 mh at 460 watts.
so nvidia 3080 is a bit more power hungry but uses less space
the 6800 xt uses less power
and the 5700xt and 5600 xt are still okay.
just wait for optimizations from miner developers. then it will hit its performance 100-120mhs 6800xt will do i think with much more less power.
i remember when 5700 came out and was giving 3mhs. so wait for it,
Do you see how many more transistors got added to the GPU as in CUDA cores. You can't power them with hamsters - they need electricity. "100-120MH/s with much more less power" - I have a bridge to sell you.