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Author Topic: 6970 question  (Read 1050 times)
bdempsey4009
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July 26, 2011, 05:09:03 PM
 #1

I have 3 6970's, which previously I had 2 in a ubuntu machine and 1 in an xp box.  I was averaging 330 m/hashes per gpu.  Today I put all 3 in my ubuntu box and now I average 280 - 300 m/hashes.  Why the drop in hashing power and is there anything I can do to regain the original hashing power?
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SHlFT
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July 26, 2011, 05:21:41 PM
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thats pretty low to begin with.

i have two 6970 going at around 800MHashs/s total

bdempsey4009
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July 26, 2011, 08:04:05 PM
 #3

Any ideas for me to try?  Or what could be the problem?
ToriAmos1963
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July 26, 2011, 09:18:08 PM
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I don't know if there is an equivalent setting in Ubuntu, but make sure the "Power Control" setting in AMD's Catalyst driver is at 20%.  I have a single XFX 6970 running at 950 MHz and 420 Mhps with a temp that hovers around 70 degrees.  If I set the "Power Control" to 0%, my speed drops when I go over 900 MHz.

19bcU3x3Z4d2niU6JubSuZyPBBUgmTFEff
SHlFT
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July 26, 2011, 09:58:21 PM
 #5

I don't know if there is an equivalent setting in Ubuntu, but make sure the "Power Control" setting in AMD's Catalyst driver is at 20%.  I have a single XFX 6970 running at 950 MHz and 420 Mhps with a temp that hovers around 70 degrees.  If I set the "Power Control" to 0%, my speed drops when I go over 900 MHz.

That's a very good configuration.

ToriAmos1963
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July 26, 2011, 10:11:33 PM
 #6

I got a nice boost when I switched from GUIMiner to bitminter miner.  It works really well for 6000 series radeon cards.  I was at 400s with GUIMiner and now I'm in 420s with 0.2% stale/rejected shares.  The author is very active on this board and is constantly adding features that users want.

Check out this thread:

http://forum.bitcoin.org/index.php?topic=22432.0

I don't know if there is an equivalent setting in Ubuntu, but make sure the "Power Control" setting in AMD's Catalyst driver is at 20%.  I have a single XFX 6970 running at 950 MHz and 420 Mhps with a temp that hovers around 70 degrees.  If I set the "Power Control" to 0%, my speed drops when I go over 900 MHz.

That's a very good configuration.

19bcU3x3Z4d2niU6JubSuZyPBBUgmTFEff
Mistafreeze
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July 27, 2011, 02:54:56 AM
 #7

I don't know if there is an equivalent setting in Ubuntu, but make sure the "Power Control" setting in AMD's Catalyst driver is at 20%.  I have a single XFX 6970 running at 950 MHz and 420 Mhps with a temp that hovers around 70 degrees.  If I set the "Power Control" to 0%, my speed drops when I go over 900 MHz.

That's a very good configuration.

I also have a XFX 6970. Clock @ 950, but my Power Control is at 5% getting 423Mhps. Runs about 70 degrees with the fan at 65%. I didn't see any increase when I moved the power control beyond 5%.

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ToriAmos1963
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July 27, 2011, 02:21:32 PM
 #8

I think the "Power Control" allows the card to pull more current if it needs it.  It won't make a difference if there is not need for extra juice.  I was just lazy and my temps were low enough that I didn't tinker with it.

I don't know if there is an equivalent setting in Ubuntu, but make sure the "Power Control" setting in AMD's Catalyst driver is at 20%.  I have a single XFX 6970 running at 950 MHz and 420 Mhps with a temp that hovers around 70 degrees.  If I set the "Power Control" to 0%, my speed drops when I go over 900 MHz.

That's a very good configuration.

I also have a XFX 6970. Clock @ 950, but my Power Control is at 5% getting 423Mhps. Runs about 70 degrees with the fan at 65%. I didn't see any increase when I moved the power control beyond 5%.

19bcU3x3Z4d2niU6JubSuZyPBBUgmTFEff
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