text_combined: randall r schulz rgpoguasonicnet saturday 09 february 2008 1008 philippe landau wrote many power supplies efficient dont operate close full load seemed counterintuitive decided little looking around according graph page 14 power supplies hidden opportunity energy savings case switching powersupplies efficiency peak producing 50 maximum rated output however curve low side efficiency peak much steeper high side suspicion mostly correct psu twice capacity called supply waste significantly power one used 50 100 range kind regards philippe randall schulz tue 05 aug 2008 163028 0800 opensuse unstable system culprit