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April 09, 2013, 03:43:13 PM |
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I had similar problem with one of my 7970s, I just kept messing with MSI AB, deleting AB's "profiles" folder, resetting Catalyst overdrive, powertune, changing cgminer clocks, and so on. Finally the slow card picked up the same speed as all of the other cards. Still no clue what was actually wrong, all the settings are same as before, but everything has been touched and changed a bit back and forth to refresh them many times.
You could try to switch places so the slow card goes to other cards place and see if there is a difference.
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