ungaro59 (OP)
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December 31, 2013, 05:43:40 PM Last edit: December 31, 2013, 07:12:08 PM by ungaro59 |
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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=111196-02-40G 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](https://bitcointalk.org/Smileys/default/sad.gif) 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.
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skleven
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December 31, 2013, 05:46:06 PM |
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So no luck lowering the volt in cgminer either?
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ungaro59 (OP)
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December 31, 2013, 05:47:13 PM |
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So no luck lowering the volt in cgminer either?
No, it does not work with cgminer.
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ineedit
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![](https://bitcointalk.org/Themes/custom1/images/post/xx.gif) |
December 31, 2013, 05:48:14 PM |
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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=111196-02-40G 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](https://bitcointalk.org/Smileys/default/sad.gif) 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?
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ungaro59 (OP)
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December 31, 2013, 05:49:53 PM |
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Are the BIOS versions the same?
Yes, these are exactly the same cards and bios versions. ![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fgpuz.techpowerup.com%2F13%2F12%2F31%2F5mk.png&t=665&c=1wwQZZF89CnUZg)
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skleven
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December 31, 2013, 05:53:39 PM |
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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?
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ungaro59 (OP)
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December 31, 2013, 05:55:48 PM |
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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.
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skleven
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![](https://bitcointalk.org/Themes/custom1/images/post/xx.gif) |
December 31, 2013, 05:57:48 PM |
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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.
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chup
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December 31, 2013, 06:04:19 PM |
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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...
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ungaro59 (OP)
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December 31, 2013, 06:22:31 PM |
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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 : ![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimg15.hostingpics.net%2Fthumbs%2Fmini_561736trixx.jpg&t=665&c=bzGNKVRendmQAQ) but only One card. The first card is ok. The second, no. The first card : ![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimg15.hostingpics.net%2Fthumbs%2Fmini_206275first.jpg&t=665&c=HqnOwW94tDeizg) The Second card : ![Huh](https://bitcointalk.org/Smileys/default/huh.gif)
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Wipeout2097
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December 31, 2013, 08:42:46 PM |
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ineedit
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January 01, 2014, 02:21:48 PM |
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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.
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ungaro59 (OP)
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January 01, 2014, 03:40:39 PM |
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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. ![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimg11.hostingpics.net%2Fthumbs%2Fmini_737525vbe7.jpg&t=665&c=ovD-LgGBeLsTcg)
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimg11.hostingpics.net%2Fthumbs%2Fmini_502966VBE72.jpg&t=665&c=0OV7xUm99rtHfg) Unfortunately, voltage regulator is Unknow. Do you think I can still flash by changing the voltage ?
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ineedit
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January 01, 2014, 04:34:33 PM |
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...
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?
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If I have been help then please show your thanks BTC: 127PRogAVZiV3fEmpJERh9KemK3a3Ffh6G LTC: LXghFL8mZffpTFkm2nRTesuDrV5DJQP3Js
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ineedit
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January 02, 2014, 08:42:16 AM |
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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.
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If I have been help then please show your thanks BTC: 127PRogAVZiV3fEmpJERh9KemK3a3Ffh6G LTC: LXghFL8mZffpTFkm2nRTesuDrV5DJQP3Js
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