Got all of my stuff on a refitted 240V circuit. 30A breaker outside. I think it was an old dryer circuit. Have 8 750W power supplies running at about 60-70%
load each. Used an inductance meter to measure before/after 120V to 240V switch, same load. Netted about 120W reduction in usage and power cords that are
cold to the touch. Anything warm on AC voltage side makes me nervous. Small benefit but worth the effort I think.