It is usefull to see if they are always the same cards that are 0... or if you swap the pci riser to be 0Mhs another position if that 0 goes to that card or stills in the same position... That will let more information.
By swapping the GPU, I get a result with the same GPU numbers that do not work.
It looks like the miner does not work correctly with the old version of OpenCL.
