Well, I have stopped running the cards at 90 C after being concerned for their longetivity 
Currently I'm stable at 81 C both cards, with case fans at max speed and card fans at 71% and 48%, respectively. I get 618-622 Mh/s out of each card.
The cgminer command I use to obtain that is:
However, the cards are seemingly ignoring cgminer's gpu settings. They are both running at 1100 MHz core clock and 1375 MHz memory clock.
Currently I'm stable at 81 C both cards, with case fans at max speed and card fans at 71% and 48%, respectively. I get 618-622 Mh/s out of each card.
The cgminer command I use to obtain that is:
Code:
cgminer.exe -O u:p -o lax1.thedimi.net:9332 --submit-stale -g 1 -k diakgcn -v 2 -w 256,256 -I 7 --gpu-powertune 10 --gpu-memclock 550 --gpu-engine 1100 --auto-fan --temp-target 83
However, the cards are seemingly ignoring cgminer's gpu settings. They are both running at 1100 MHz core clock and 1375 MHz memory clock.
-Subtract 150 from your core clock and set you mem clock at the result. Ex: 1100 core/950 mem. Beyond this 150 difference the mem clock will revert to default.
- Set powertune to 5, beyond 5 (according to ckolivas) there is no gain.
- Use the latest cgminer 2.4.1 and discard the --submit stale option (not needed anymore).
- Try also the poclbm kernel.
- Set a higher intensity (max 11).
I get with 7970 (XFX double fan) around 705Mh/s at 69.0C with latest cgminer and default poclbm kernel (1180/1030).
