Hi All,
I have decided to give nvOC a go, I am using an older Gigabyte GA-EX58-UD4P (Socket LGA1366) board and an i7 920 CPU. I have two EVGA GTX 1080ti on risers in both PCI-E x16 slots.
I am able to boot fine but things just are not stable, I can run for about 15 hours but later GPU0 drops to about 150-170w and SOLs are suffering, I can reboot and get it working but it seems to happen again.
I have no idea if any BIOS changes need to be made to get this running stable or not, does anyone have any idea what I can try?
Also if I kill the mining process and make changes to the onebash config it doesn't seem to accept the changes, more specially the fan speed. I attempt to launch the miner again and get the below error but the process does start;
Failed to connect to Mir: Failed to connect to server socket: No such file or directory
Unable to init server: Could not connect: Connection refused
ERROR: The control display is undefined; please run `nvidia-settings --help`
for usage information.
When the mining process starts do you see OC messages like this?

If you don't:
At any point did you boot with the monitor connected to the motherboard?
Did you at anytime boot with only one GPU attached?
If either of these is the case: ensure the monitor is attached to the primary GPU ( the one connected to the 16x slot closest to the CPU )
then follow this process:
https://bitcointalk.org/index.php?topic=1854250.msg19449945#msg19449945