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://bitcointalksearch.org/topic/m.6989373Anyway, now I got a straight line representing my mem clock speed.
Yes, it looked like in your picture. However, I did not use to keep Afterburner running. Installed it, changed settings and took it off. Just noticed yesterday this strange memory behaviour when trying to look for a sweet spot for my cards frequencies (used this:
http://www.reddit.com/r/litecoinmining/comments/1uv67j/cgbenchmark/) and I got errors on memory setting.
After more than 8.5 hours of only mining, my system looks like that:
- hashes somewhere between 4.1 and 4.2:
https://www.dropbox.com/s/k9e9yhd0gaal13u/Hashes%20June%201.png- pretty stable gpus, but a strange slow RAM increase:
https://www.dropbox.com/s/cts1eqlwjgsuy7n/GPUsMonitor%20June%201.png- more stable received pool hash:
https://www.dropbox.com/s/sj6u3mwe8c4eqwm/PoolHashJune1.png- still a restless system (overall power consumption), which was not the case on cgminer 4.7.3 times:
https://www.dropbox.com/s/1mnawjy5k9r8nxy/PowerconsumptionJune1.pngI have no idea what's going on. One thing is certain, stabilizing the memory frequency got me a hash increase (3.6 -> 4.1).
Just to sum up the system config: 2 x ASUS R9290DC2OC, AMD 14.3beta, Win 8.1.
Unfortunately I'm just a user so it's hard for me to figure out what induces stress on my PC or how big this stress is so I can estimate the risks of breaking it.