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Sapphire 5850 Xtreme overclocking and voltage adjustment in Ubuntu

post #1 of 10
Thread Starter 
Hello all,
I am trying to tweak my sapphire 5850 in Ubuntu. I have found numerous tools to adjust clock speeds, but I need to bump the voltage up to keep the card stable.

I can boot into Windows and use Trixx and MSI Afterburner to get the voltage to 1.188 and the card runs stable and cool at 950 on the GPU.

I have not found a way to adjust the voltages in Linux yet. I was hoping one of you guys could help.

Is there a software solution to tweak the voltages in Linux the same as I can in Trixx? Is it possible (and better) to modify the BIOS for the higher voltages?
post #2 of 10
Quote:
Originally Posted by BooDaddy;13764061 
Hello all,
I am trying to tweak my sapphire 5850 in Ubuntu. I have found numerous tools to adjust clock speeds, but I need to bump the voltage up to keep the card stable.

I can boot into Windows and use Trixx and MSI Afterburner to get the voltage to 1.188 and the card runs stable and cool at 950 on the GPU.

I have not found a way to adjust the voltages in Linux yet. I was hoping one of you guys could help.

Is there a software solution to tweak the voltages in Linux the same as I can in Trixx? Is it possible (and better) to modify the BIOS for the higher voltages?

I didnt know those cards even had voltage control, i have the most expensive HD5850 in production and i dont even have that, so why does teh cheapest have it?
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post #3 of 10
Thread Starter 
I dunno.. I can adjust the voltage all the way up to 1.2 volts in Trixx. Have you tried using it?

I do know that in Windows using TRixx, the card runs rock solid and stable at 950 and using voltages around 1.188.
post #4 of 10
I think bios modding is the only way to get volt control .
     
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post #5 of 10
Thread Starter 
I was thinking as much, I have very little experience in bios editing, has anyone succesfully adjusted the voltage on these cards without any problems?
post #6 of 10
Use amdoverdrivectrl it has voltage control for amd/ati in Linux.
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post #7 of 10
Thread Starter 
I have tried it, but it will not let me adjust the voltage past 1.088. when I edit the .ovdr profile with my desired voltage it gives an error when I run it. Its just odd that Trixx will let me adjust all the way up to 1.2 but no program exits in linux to do the same.
post #8 of 10
Oh sorry. Is there away to set it in cli with aticonfig or did you already look there? Not sure just throwing it out there I know it has overdrive options.
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post #9 of 10
Thread Starter 
Yeah I can use aticonfig to adjust the clocks, but not voltages. So, without bumping the voltages, I cant maximize the clocks speeds in Linux like I can in windows. I am running 11.5 driver and AMD SDK 2.4.

In linux I am lucky to get 900 and keep the machine stable, in windows, 950 runs like no ones business....and I hate windows frown.gif
post #10 of 10
Quote:
Originally Posted by terence52;13764158 
I think bios modding is the only way to get volt control .

Nope, changing the bios on the sapphire 5830 xtreme didn't change the voltage for me at all. Just caused troubles so I had to flash back to the stock bios.
Meh >.<
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Meh >.<
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