beluga

In the batch file, start with:
DaggerGpuMiner.exe -G -a -p -list-devices -G
pause

you will see numbers for your GPUs. I have 3 GPUs and got the numbers 0,1, and 2
close the cmd window
Then edit the batch file again with:

DaggerGpuMiner.exe -G -a -p -opencl-devices 0 1 2
pause

That is it  Cheesy

I put the numbers 0 1 2 that I have got in the first cmd window.
Try it and let me know.
Got to go to work shortly.