It's definitly not the setting you pointed out in that thread, because you don't have the symptoms of this issue, which are: GT2 and GT3 much lower. 30FPS is nothing.
Seems to me that you want it to be something else than good or bad cards. How can you be so sure about this issue when you're replying in a thread that contains 20+ pages of possible solution and yet no one but Hipro5 has been able to find a cure for it. That's just not right.
What the actual problem is, is at the moment unknown and the only current explanation is the concept of good and bad cards. Come up with a better theory or accept the current one, which actually gives a 100% workable solution. The only problem is that the solution currently involves money.
Mines has too, although I have found a certain point at which I can switch between runs, which has nothing to do with any form of overheating whatsoever. Overclocking the FSB helped me to go from low to high runs.
If those two scores are actually done on the same system, frequencies, tweaks, ... than there's something wrong, but not this issue. This issue, as I already pointed out, deals with the GT2/GT3 being either very low or high (high = normal in fact), while you go from 126k to 138k where:
-GT1: 1160 -> 1300
-GT2: 1110 -> 1240
-GT3: 891 -> 961
-GT4: 904 -> 987
GT1 indicates a change in cpu frequency, GT4 indicates a change in gpu frequency. The increase in GT2 and GT3 can be explained by an increase of cpu and gpu frequency.
The sideport function of the 4870X2 cards was apparently fused off the cards by Ati because enabling it caused cards to use much more energy, while the sideport performance scaling was very poor.
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