I think this is a pretty silly article. Yes some PSUs are more efficient than others, but we're talking about the difference between 80% worst case to 95% best

I think this is a pretty silly article. Yes some PSUs are more efficient than others, but we're talking about the difference between 80% worst case to 95% best case. So at best you're lowering conspution by around 10-15%, which is not nothing, but it's also no where near addressing the fundamentally huge power consumption of crypto. Also realistically since energy is one of the two primary costs of crypto mining, miners are probably pretty clued up already about efficient PSUs so it may well be that there is 0 energy consumption that can be reduced by moving to more efficient PSUs. It would be kind of comical if crypto miners had gone to the trouble of designing ASICs for mining but hadn't bothered to have a browse on newegg for a decent PSU.