Thanks, I was using 19-1.4 but will try version 19-2.0 now.
Is there a way to mine only certain gpu's?
There is no built-in option to select particular gpu's only yet. The default scripts select all available Gpu's.
For example you could use ETH_EXTENSION_ARGUMENTS="" and supply extra arguments for Claymore miner (consult claymore how to select gpu's), but if you want to mine ethash with gpu's 0-3 and equihash with gpu's 4-7 You would need to supply appropriate arguments to both miners involved and you will need to use individual PL, Core and Mem settings because different algos require different settings.
Hopefully we will implement some simpler settings for selecting particular cards, dual/triple miners and algos in future versions of nvoc
Dont forget if you chose to mine with some GPUs for example in ethminer dont mine with GPU 1 :
ETH_EXTENSION_ARGUMENTS=" --cuda-devices 0 2 3 4 5 6"
You should make some change in watchdog or disable it so it wont catch low utilization.
For example if you disable one GPU, open 5watchdog and find this line
if [ $NUM_GPU_BLW_THRSHLD -gt 0 ]
if you disable 1 card change 0 to 1, if you disable 2 cards, change it to 2, it will send some warning but will not restart miner.
Thanks papampi for your help, if I am using ZM miner which file do I need to amend to specify the GPU's to mine?