Mailinglist Archive: radeonhd (408 mails)

[Matthias Hopf <mhopf@xxxxxxx>]

On May 20, 09 15:24:36 -0500, David C. Rankin, J.D.,P.E. wrote:
>       The log now shows that ForceLowPowerMode was used to set the clock at 
> 100000 
> Mhz. The heat is reduced, but not by as much as I had hoped. Originally I had 
> tried to set "LowPowerModeEngineClock" "50000", but when X started, the 
> screen was wildly distorted and "stretched?" so that the kdm login was at the 
> far right side of the screen.

To my experience any clock setting below 200MHz will possibly crash the
machine (whole machine freeze, i.e. the PCI bus locked up). I don't know
the exact lower frequency, but 200MHz seems to be a save lower limit.

>       Funny, I don't notice any performance difference between the clock at 
> 400000 
> or 100000. Let me know what else I can send you. Thanks again!

We're not really utilizing the chip at all ATM. You might find
differences in speed when using 3D applications.

Matthias

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