Peter Hüwe wrote: > Hi, > > is there an easy way to figure out the power consumption of my machine, which > is a normal desktop pc ? > No.
There are power meters you could plug your computer into, which is probably about as easy as it gets. CPU's with frequency scaling advertise claimed power usage in /proc/acpi/processor/CPU0/performance. I don't think there's an equivalent for any other component, though if you could see if other people have measured power savings with components which match yours. E.g. if you're considering the ATA Link Power Management patches, someone may have measured and published power savings for ATA hardware similar to your own. If you have a good CPU temperature sensor and disable "smart fan control" (BIOS option), you can use the CPUs temperature as an approximate, relative, non-linear measure of its power usage during experiments. e.g. I use highly inadvisable kernel patches to undervolt my CPU, lowering the voltage used at maximum frequency to the default used during the minimum frequency. I'm not suggesting you try undervolting, but I compared the temperatures with the CPU under load, and I did see a difference. You should see something similar with enabling CPU frequency scaling. Alan _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
