On Sat, 09 May 2009, Preben Randhol wrote: > On Sat, 9 May 2009 13:56:09 +0800 > bill lam <cbill....@gmail.com> wrote: > > > Thanks all for confirmation. Since I only have a desktop, no > > notebook/netbook ;-( it is somehow difficult to verify the > > improvement. I now lock the cpu frequency to 1.1GHZ (half of the > > original 2.1G). > > Why on earth do you want to do this to a desktop computer? It will have > next to no effect on your power consumption. I mean you whole system > will draw the main part of the power. Anyway, put the power saving so > that the CPU scales with load. This makes more sense. And turn down > the brightness on your monitor, that saves power too.
I got a wattage/current electricity meter to measure the actual power consumption. assuming power factor=1, unit in watts BIOS LOCKED AT ........................... 1.1GHZ .......2.2GHZ loading ~3% 53 55 mplayer/avi ~16% 66 70 ./configure && make ~50% 69 83 full load >90% 75 93 It appears the saving is only a few watts for light to normal loading. I use reverse video (white on black), the lcd use about 10 watts. -- regards, ==================================================== GPG key 1024D/4434BAB3 2008-08-24 gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 唐詩013 王維 送別 下馬飲君酒 問君何所之 君言不得意 歸臥南山陲 但去莫復聞 白雲無盡時