randall r schulz rgpoguasonicnet saturday 09 february 2008 1122 philippe landau wrote randall r schulz wrote 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 much depends power supply question course go back original question mine issue whether highly overrated supply wasteful power appears randall schulz tue 05 aug 2008 163328 0800 opensuse power supply psu efficiency unstable system culprit