Comment by miohtama
Any relevant crypto has been not mined on GPUs for a long time.
But a point was made to make it less parallel. For example, Ethereum uses DAG, making requirement to have 1 GB RAM, GPU was not enough.
https://ethereum.stackexchange.com/questions/1993/what-actua...
Also any GPUs are now several generations old, so their FLOPS/watt is likely irrelevant.