Hello,
> I'd say it depends on the model of GPU, but don't forget GPUs nowadays
> have more transistors than CPUs. (Latest Intel CPUs have 300 million,
> Latest ATI GPUs have more than 700 million ; though that's for desktop
> chips)
> I wouldn't be surprised if a GPU not in powersave mode would suck up
> to 8 Watts.
On my HP Compaq notebook (model: nx9420: Intel(R) Core(TM)2 CPU T7400 @ 2.16GHz)
with a Ati Radeon Mobility X1600 card I can reduce the power consumption by
about 11,4
watt by setting the power state from "default state" to "low voltage".
regards,
Arno
P.S.: Here is some console output:
> aticonfig --lsp
core/mem [flags]
-----------------
1: 209/135 MHz [low voltage]
* 2: 392/252 MHz [default state]
3: 425/378 MHz [performance mode]
powertop: Power usage (ACPI estimate): 38.4W (1.6 hours)
> aticonfig --set-powerstate 1
Warning : Option 'PowerState' is exclusive, other options will be ignored.
> aticonfig --lsp
core/mem [flags]
-----------------
* 1: 209/135 MHz [low voltage]
2: 392/252 MHz [default state]
3: 425/378 MHz [performance mode]
powertop: Power usage (ACPI estimate): 27.0W (2.3 hours)
lspci:
01:00.0 VGA compatible controller: ATI Technologies Inc M56P [Radeon Mobility
X1600]
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