[ltp] Fwd: Tool for under- and over-clocking radeon cards

[Carlos Maldonado]

gkrellm 2.2.6 (stock, no plugins) and higher has support for GPU temperature

you need to have ibm-acpi 0.11 installed (kernel module)

if you load them with the experimental=1 option you can change the fan 
speed with that, pretty nifty

regards

Carlos

Alex Deucher wrote:
> FYI, for those of you interested in over/underclocking your radeons...
> 
> Alex
> 
> ---------- Forwarded message ----------
> From: Daniel Bonniot <Daniel.Bonniot@inria.fr>
> Date: Jul 8, 2005 12:21 PM
> Subject: Tool for under- and over-clocking radeon cards
> To: xorg@freedesktop.org
> 
> 
> 
> Hi,
> 
> I wrote a user-space tool to control radeon cards (in particular change the
> clock speeds) under linux and possibly other Unix-like systems.
> 
> The code is heavily borrowed from two previous programs:
>    radeon_dump (by Hui Yu <hyu@ati.com>, with authorization)
>    r6setclk (by Vahur Sinijärv, for Windows, under GPL)
> I put it together, implemented
> the full automatic detection of all card parameters, and wrote the
> main program. Many thanks also go to Aapo Tahkola who started the
> conversion of r6setclk to unix, and to Roland Scheidegger who
> helpfully provided links and information that enabled me to get this
> program working.
> 
> The source is available at http://gna.org/projects/radeon-control/ and
> distributed under the GPL.
> 
> At this point, you need to get the source for the subversion repository.
> Compile with simply 'make', and the binary will be in src/. Comments and
> contributions are welcome.
> 
> I have tested this tool with a Radeon Mobility 9600 M10 card with 128MB,
> but it should work with the whole Radeon family.
> 
> THIS PROGRAM COMMUNICATES WITH THE CARD AT VERY LOW LEVEL, SO IT
> MIGHT POTENTIALLY DAMAGE YOUR HARDWARE. USE WITH CAUTION!
> 
> My initial goal was to experiment with underclocking to save power and heat on
> my Mobility M10 card (although I suppose many people will want to overclock).
> My initial mesurement showed that vastly underclocking (from the default
> 350/200 MHz to 100/100 MHz) did make a noticable difference on an idle machine
> (from 960 mA to 910 mA for the whole machine, and the disk was spinning). That
> was in single user mode, text mode, to make the mesurement more dependable.
> Hopefully I will one day find time to make more mesurements. I'm interested to
> hear about other people experience, and if anybody knows a way to probe
> radeons' temperature.
> 
> As far as I understand, PowerPlay is not supported on linux (neither xorg nor
> fglrx), only dynamic clocking. Maybe with PowerPlay the underclocking would
> become unnecessary, but I guess overclocking would still be interesting to
> gamers...
> 
> Enjoy,
> 
> Daniel
> 
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