I've noticed that in CGMiner my second card (GPU1), always seems to perform worse.
On one rig I have a 6950 and 7870. When the 6950 was alone, I was able to clock it at ~940Mhz core and it was rock solid stable. Since I've paired it with the 7870, I'm unable to get it stable at the same voltage at anything higher than 880Mhz.
I now have a second rig with two identical 7870s in it that is having the same problem. The second card, under GPU1, dies at overclocks that should be stable. I realize there is variance from card to card at what is stable, but it shouldn't be a 40Mhz difference between identical cards?
Any advice?
Topic: Overclocking stability with multiple cards and CGMiner (Read 676 times)
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