Care to explain how please?
start in one cmd or shell ethminer with propper parameters and on a second sgminer-decred with -I 18 and below ... will let you mine decred and et* at same time and hashrate on ethminer will not drop down ... you could play with the -I parameter... raise em or lower em and take a look at hashrate on ethminer... if it drops go 1 step back
good point , thanks for explanation. Maybe you also have an idea for stop mining only on overheating cards instead of stopping the whole miner ?
Sgminer has a --temp-cutoff parameter (comma separated values for each card) which you can set to stop the decred mining. Ethminer will carry on as normal though. Providing that running Ethminer alone doesn't cause overheating then this method should be sufficient.
See all the sgminer params:
sgminer --help
Dump params to text file
sgminer --help > sgminer.txt