Need help UnderVolt dual Sapphire 7950 OC 3Go w/cgminer

ineedit

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Quote from: ungaro59 on January 01, 2014, 03:20:47 PM

Quote from: ineedit on January 01, 2014, 11:34:33 AM

Quote from: ungaro59 on January 01, 2014, 10:40:39 AM

...

Unfortunately, voltage regulator is Unknow.

Do you think I can still flash by changing the voltage ?

Where did you get these cards from, what is their history?

These are the latest graphics cards bought 15 days ago :

link :
http://www.amazon.com/Sapphire-11196-02-40G-PCI-Express-Version-Graphics/dp/B0070APVP2/ref=pd_sxp_f_pt

Odd as the BIOS you have on them is listed for a 280x not a 7950. I would flash them with a listed BIOS and try again. Take a copy of the original BIOS though just in case.

ungaro59

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Quote from: ineedit on January 01, 2014, 11:34:33 AM

Quote from: ungaro59 on January 01, 2014, 10:40:39 AM

...

Unfortunately, voltage regulator is Unknow.

Do you think I can still flash by changing the voltage ?

Where did you get these cards from, what is their history?

These are the latest graphics cards bought 15 days ago :

link :
http://www.amazon.com/Sapphire-11196-02-40G-PCI-Express-Version-Graphics/dp/B0070APVP2/ref=pd_sxp_f_pt

ineedit

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Activity: 252

Merit: 250

Quote from: ungaro59 on January 01, 2014, 10:40:39 AM

...

Unfortunately, voltage regulator is Unknow.

Do you think I can still flash by changing the voltage ?

Where did you get these cards from, what is their history?

ungaro59

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Activity: 679

Merit: 507

Quote from: ineedit on January 01, 2014, 09:21:48 AM

Inspect the cards and see if they are the same revision?

This happens with Gigabyte 7950 Windforce as well, with rev 1 cards you can change the voltage but with rev 2 cards you cannot as the control circuits to do so have not bee added to the board.

Yes it's the same revision.

Quote from: Wipeout2097 on December 31, 2013, 03:42:46 PM

You must mod and reflash the bios then

http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/

Unfortunately, voltage regulator is Unknow.

Do you think I can still flash by changing the voltage ?

ineedit

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Activity: 252

Merit: 250

Inspect the cards and see if they are the same revision?

This happens with Gigabyte 7950 Windforce as well, with rev 1 cards you can change the voltage but with rev 2 cards you cannot as the control circuits to do so have not bee added to the board.

Wipeout2097

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You must mod and reflash the bios then

http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/

ungaro59

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I tried several possibilities. The only one who can change the voltage of a card seems to be the options below :

but only One card. The first card is ok. The second, no.

The first card :

The Second card :

chup

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Quote from: ungaro59 on December 31, 2013, 12:43:40 PM

Do you know an utility that allows you to change the voltage of these cards ?
Trixx does not work well with these cards.

Thank you in advance.

Have You tried checking box "Synchronize cards in Multi-GPU config" under Trixx settings?
AFAIK "Disable ULPS" should be ticked as well...

skleven

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Quote from: ungaro59 on December 31, 2013, 12:55:48 PM

Quote from: skleven on December 31, 2013, 12:53:39 PM

Quote from: ungaro59 on December 31, 2013, 12:47:13 PM

Quote from: skleven on December 31, 2013, 12:46:06 PM

So no luck lowering the volt in cgminer either?

No, it does not work with cgminer.

Many weird things have happened in my time as a miner. So just to check, have you tried to run them in crossfire?

No, I have not tried because it seems to me that cgminer do not like this..??

That is correct, but it was just to find out if it did any difference.

ungaro59

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Activity: 679

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Quote from: skleven on December 31, 2013, 12:53:39 PM

Quote from: ungaro59 on December 31, 2013, 12:47:13 PM

Quote from: skleven on December 31, 2013, 12:46:06 PM

So no luck lowering the volt in cgminer either?

No, it does not work with cgminer.

Many weird things have happened in my time as a miner. So just to check, have you tried to run them in crossfire?

No, I have not tried because it seems to me that cgminer do not like this..??
And thereafter, I want to put 5 cards in the rig.

skleven

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Activity: 281

Merit: 250

Quote from: ungaro59 on December 31, 2013, 12:47:13 PM

Quote from: skleven on December 31, 2013, 12:46:06 PM

So no luck lowering the volt in cgminer either?

No, it does not work with cgminer.

Many weird things have happened in my time as a miner. So just to check, have you tried to run them in crossfire?

ungaro59

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Activity: 679

Merit: 507

Quote

Are the BIOS versions the same?

Yes, these are exactly the same cards and bios versions.

ineedit

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Activity: 252

Merit: 250

Quote from: ungaro59 on December 31, 2013, 12:43:40 PM

Hello,

I have a rig with two cards Sapphire HD 7950 3Go OC :
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1450&lid=1

11196-02-40G
Vddc : 1.25V
Clock : 925Mhz
DDR5 : 1250Mhz

I want to undervolt to 1.15V the TWO cards in the same time when Windows starting (it reduces consumption 40-50W).
I changed two cards at 1,15V and save the profile in Sapphire TriXX.
But when windows restart, only 1 card is undervolt, the second card is back to 1,25V. Sad

Do you know an utility that allows you to change the voltage of these cards ?
Trixx does not work well with these cards.

Thank you in advance.

Are the BIOS versions the same?

ungaro59

hero member

Activity: 679

Merit: 507

Quote from: skleven on December 31, 2013, 12:46:06 PM

So no luck lowering the volt in cgminer either?

No, it does not work with cgminer.

skleven

sr. member

Activity: 281

Merit: 250

So no luck lowering the volt in cgminer either?

ungaro59

hero member

Activity: 679

Merit: 507

Hello,

I have a rig with two cards Sapphire HD 7950 3Go OC :
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1450&lid=1

11196-02-40G
Vddc : 1.25V
Clock : 925Mhz
DDR5 : 1250Mhz

I want to undervolt to 1.15V the TWO cards in the same time when Windows starting (it reduces consumption 40-50W).
I changed two cards at 1,15V and save the profile in Sapphire TriXX.
But when windows restart, only 1 card is undervolt, the second card is back to 1,25V. Sad

Do you know an utility that allows you to change the voltage of these cards ?
Trixx does not work well with these cards.

Thank you in advance.

Topic: Need help UnderVolt dual Sapphire 7950 OC 3Go w/cgminer (Read 3821 times)