For me your miner is way more stable than ewfb's. While ewfb's simply hangs in 24-48hrs period on Windows and even sooner under Ubuntu, yours working stable. If only I could figure out how to overclock under Linux on a headless rig...
I can help you with that......
Create a new X11/Xorg config using
nvidia-xconfig -o xorg.conf --enable-all-gpus --cool-bits=28 --allow-empty-initial-configuration
.
Move/copy the config to /etc/X11
cp ./xorg.conf /etc/X11
Kill all your Xorg/X11 processes (or reboot)
Use the following sequence to OC your cards
Xorg :0 &
sleep 5
export DISPLAY=:0
/usr/bin/nvidia-settings -a GPUPowerMizerMode=1
/usr/bin/nvidia-settings -a GPUFanControlState=1
/usr/bin/nvidia-settings -a GPUTargetFanSpeed=100
/usr/bin/nvidia-settings -a GPUGraphicsClockOffset[3]=10
/usr/bin/nvidia-settings -a GPUMemoryTransferRateOffset[3]=100