I have 2 cards, both running at 1050/1500MHz set with Afterburner (power limit +50). I had to take out the engine and memory settings from the config file as the memory frequency was jumping around between 150 and max setting. Very stressful on the system. Now everything is smooth. I kept only the temp control as I like the strategy.
My 290 also is jumping memory down to 150 and back, do you have any explanation what might be the reason for this behavior?!
Yes, powertune - when it's not configured properly mem-clock will throttle up and down (150-your mem speed).
I also had this issue and after looking for a solution for over a week I managed to fix it by enabling 'Unofficial overclocking mode without PowerPlay support'. I assume of-course that you are using MSI afterburner.
Uninstalling MSI AB might also fix it, or alternatively installing it if you haven't got it.
I made a topic about it a few days ago but no1 responded there; I had an image uploaded there, does it look similar to that?
https://bitcointalk.org/index.php?topic=628425.msg6989373#msg6989373Anyway, now I got a straight line representing my mem clock speed.
Wow thanks for that, it's gotten me up to the 4.05-4.1mh/s level with my 290 tri-x's using my previous config but with 5 threads now instead of 1.
I tried other drivers but 12.13 seems to work best for me on Windows 7. Using the B2_sick version.