Ok, TC is not related to system memory. What else could cause the memory errors at an average TC?
edit: Thx uray for all your efforts. I tried the latest version which is now working with every TC as long as it is not too low.
However, I can configure my cards with various gpu clock, memclock, TC and they ALWAYS get a max of 750kh. It even seems like the config has no impact on the speed as it doesn't matter if I clock something 100mhz higher or lower. The .conf file is loaded right as all my pools are available.
Very odd. Tried also with sgminer and cgminer-kalroth - but same behavior.
Btw: replace last line of start.sh in the sgminer-folder with "./sgminer -c mining.conf".
Did you happen to save your conf while in the cgminer window (s,w)? if you save through the cgminer client, it saves cgminer.conf in the root/.cgminer folder or something like that. That always overrides the mining.conf in the /opt/miner/cgminer folder.
I have my own problem though, why can't I connect with vnc? I get an error that the connection was actively refused.