undervolting r9 280x linux - possible?

[gemini]

Hi there
Is there any way to undervolt r9 280x under linux (SMOS/BAMT to be exact)? I've seen people changing BIOS for HD7970 to undervolt but didn't found any bios editor for r9 280x.
Anyway would rather like use software command if possible. Or I have to use Windows for that purpose?

Cgminer of course ignores voltage settings.

[1714863161]

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[1714863161]

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[waltermot321]

Hi there
Is there any way to undervolt r9 280x under linux (SMOS/BAMT to be exact)? I've seen people changing BIOS for HD7970 to undervolt but didn't found any bios editor for r9 280x.
Anyway would rather like use software command if possible. Or I have to use Windows for that purpose?

Cgminer of course ignores voltage settings.

Use window...

[vpasic]

tried in windows, same thing!
Cgminer ignores voltage settings!

[Noruka]

not all R9 280x are unlockable. My 280x are the MSI version and i believe (from what i remember researching when i bought them) i could only find that the saphhire and MSI ones were unlockable.

I use MSI afterburner to undervolt my MSI 280xs and AMD catalyst to undervolt my 290s

[phaddie]

How do you undervolt your R9 290 using catalyst?  I have been trying for days but I can find my voltage control.

  Sorry to highjack the thread.

  Phad

[LightningBlade]

How do you undervolt your R9 290 using catalyst?  I have been trying for days but I can find my voltage control.

  Sorry to highjack the thread.

  Phad

You can't, because its R9 290.... wait until they come out with a later version...

[Prelude]

not all R9 280x are unlockable. My 280x are the MSI version and i believe (from what i remember researching when i bought them) i could only find that the saphhire and MSI ones were unlockable.

I use MSI afterburner to undervolt my MSI 280xs and AMD catalyst to undervolt my 290s

Could you possibly share your MSI 's BIOS? My MSI 280x cards are locked.

[boxofspuds]

Hi there
Is there any way to undervolt r9 280x under linux (SMOS/BAMT to be exact)? I've seen people changing BIOS for HD7970 to undervolt but didn't found any bios editor for r9 280x.
Anyway would rather like use software command if possible. Or I have to use Windows for that purpose?

Cgminer of course ignores voltage settings.

not the prettiest or simplest while looking for that stable voltage, but this looks to be a verified way to undervolt in linux.

http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/
not sure if it is working 280xs though... also what kind of card do you have. it simply may not be voltage unlocked in the first place.

Could you possibly share your MSI 's BIOS? My MSI 280x cards are locked.

http://www.techpowerup.com/vgabios/146769/msi-r9280x-3072-131009.html
But  youre MSI should NOT be vltage locked.  There's a setting in MSI afterburner that "unlocks" the voltage settings or something like that I think.  this thread talks about it
https://litecointalk.org/index.php?topic=8435.0

[cowandtea]

tried in windows, same thing!
Cgminer ignores voltage settings!

USE afterburner, should work better then cgminer....

[JCviggen]

How do you undervolt your R9 290 using catalyst?  I have been trying for days but I can find my voltage control.

  Sorry to highjack the thread.

  Phad

Use msi afterburner. But undervolting is a bit tricky because the memory OC goes to crap if you reduce the voltage on the 290.

[cowandtea]

How do you undervolt your R9 290 using catalyst?  I have been trying for days but I can find my voltage control.

  Sorry to highjack the thread.

  Phad

Use msi afterburner. But undervolting is a bit tricky because the memory OC goes to crap if you reduce the voltage on the 290.

What do you mean? Like crashes?

[phaddie]

I found settings without undervolting that got me to 840 Kh/s at 83 degrees and ~65% fan.  I feel good about that so I am not going to bother undervolting until I have a few more cards and power becomes a much bigger issue.

  Phad.

[Lewnatic]

Would be nice which settings you are using for get 840kh/s

[crazyates]

Hi there
Is there any way to undervolt r9 280x under linux (SMOS/BAMT to be exact)? I've seen people changing BIOS for HD7970 to undervolt but didn't found any bios editor for r9 280x.
Anyway would rather like use software command if possible. Or I have to use Windows for that purpose?

Cgminer of course ignores voltage settings.

not the prettiest or simplest while looking for that stable voltage, but this looks to be a verified way to undervolt in linux.

http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/
not sure if it is working 280xs though... also what kind of card do you have. it simply may not be voltage unlocked in the first place.

Confirmed that VBE7 does work with 280x cards. Flashed half a dozen Gigabyte 280xs this week, and they're all hashing @ 725KH/s @ 1.019V. Dropped consumption for a 5 GPU rig frim 1450W to 1250W, and lower temps as well. Test on one going lower and lower, and then flashing the others only took me ~5-10 minutes per card.

[hulk]

Hi there
Is there any way to undervolt r9 280x under linux (SMOS/BAMT to be exact)? I've seen people changing BIOS for HD7970 to undervolt but didn't found any bios editor for r9 280x.
Anyway would rather like use software command if possible. Or I have to use Windows for that purpose?

Cgminer of course ignores voltage settings.

I am not sure but it should work the same way using HD 7970...

[Gazza1]

Confirmed that VBE7 does work with 280x cards. Flashed half a dozen Gigabyte 280xs this week, and they're all hashing @ 725KH/s @ 1.019V. Dropped consumption for a 5 GPU rig frim 1450W to 1250W, and lower temps as well. Test on one going lower and lower, and then flashing the others only took me ~5-10 minutes per card.

Hey bro is your 1.019 the VBE7 setting or what GPUZ reports?

[crazyates]

Confirmed that VBE7 does work with 280x cards. Flashed half a dozen Gigabyte 280xs this week, and they're all hashing @ 725KH/s @ 1.019V. Dropped consumption for a 5 GPU rig frim 1450W to 1250W, and lower temps as well. Test on one going lower and lower, and then flashing the others only took me ~5-10 minutes per card.

Hey bro is your 1.019 the VBE7 setting or what GPUZ reports?

I'm using Linux, so I can't tell you what GPUz reports. I do know that the 1.019V is what VBE7 reports, and then after the flash CGMiner reports the same value. Also, power consumption dropped by ~200W for the 5 GPU rig, and temps went down a good bit as well, so I'm pretty confident that it worked.

[Evil-Knievel]

This message was too old and has been purged

[Gazza1]

Confirmed that VBE7 does work with 280x cards. Flashed half a dozen Gigabyte 280xs this week, and they're all hashing @ 725KH/s @ 1.019V. Dropped consumption for a 5 GPU rig frim 1450W to 1250W, and lower temps as well. Test on one going lower and lower, and then flashing the others only took me ~5-10 minutes per card.

Hey bro is your 1.019 the VBE7 setting or what GPUZ reports?

I'm using Linux, so I can't tell you what GPUz reports. I do know that the 1.019V is what VBE7 reports, and then after the flash CGMiner reports the same value. Also, power consumption dropped by ~200W for the 5 GPU rig, and temps went down a good bit as well, so I'm pretty confident that it worked.

Very nice

[fran2k]

ATIFLASH or ATIWINFLASH will work for flashing the BIOS.