Can't assist you on how to solve the problem, but can report I am having the same problem or similar problem to yours also on a nine card rig. I am also using smos.

Mine is a 9x 1070ti rig. It took me a while to realise I had a problem. I was not paying attention to the console.

Whats happening with mine is that the rig loads up as normal on smos with the slow start from Bminer, then when all GPUs are running at full speed, GPU 8 starts dropping off slowly, the sol rate eventually drops down to zero, the rig keeps running for a while and but then I start getting the restarts about every 30 minutes or so. When I revert back to Bminer v5.5.0 the problem goes away, the rig runs normally. I tried dialing back the overclock on GPU 8 to see if this was the problem but that didn't work either. So for now just working v5.5.0. on this rig.

Funny thing is I have another 9 card rig with identical setup to the first, same mobo same power supply etc. Except this is a mixed card rig, 6x 1070 and 3x 1070t1 but this rig runs normally on Bminer v6.0.0.

I have a third 6x 1070ti card rig and this runs problem free as well with v6.0.0.

Just go back to v5.5.0 is my fix for the moment anyhow.

Hi

I have been using bminer on 2x 12 1070ti rigs with no issue.
I have setup another rig with 9x 1080tis. The miner constantly restarts every 30mins or so. The last line in the console is "killed".
Previously when I had a riser fail while running bminer,  it stated exactly which gpu/riser it could not get temperature from.

The restarts do not happen with other softwares.

I am using simple mining and mining on nicehash.

with reference to 12 GPU rigs:

i have noticed using DSTM on my 12 gpu rigs that GPU number 7 and 11 are on noticeably wamer than the others by 5-10degrees.

 I FIND THIS REALLY STRANGE.

Any suggestions?

Thanks in advance

Is it possible to mine multiple pools with certain GPU's?

Lets say mine ZCL on GPU 0-3 and mine Zcash on GPU 3-6