[ltp] Powersaving via X

[Gilson Laurent]

Hello,

> There is an interessing Option, "reduce repetition rate" from 60hz to
> 40hz"
> (its my translation from german->english"
> 
> so i wonder, does this really help powersaving?

Yes and no. Running at 40Hz alone gives you nearly no savings. But at 40Hz you can use lower frequencies for VRAM and GPU (less Pixel/sec to produce => less clock-cyles needed).

Reducing the color-depth is useing the same approch. At 16Bit color you only need half the RAM-bandwidth => lower clocks possible.

And (V)RAM is using more power if it has to work. reading less data => less power needed. That effect is minimal compared to the savings from lower frequencies.

> and if it does, how to use
> it in linux?

radeon or closed-source driver ?

cu
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