I do this all the time. Not sure what the dig deal is
In claymore you add -di 0123, to indicate the first 4 gpus will mine that. The you can start another instance of claymore with -di 4567 for the next 4 cards to mine whatever else you want.
i think OP knows what hes saying confidently and experienced he got my
attention and now i want to do it mining two coins using single rig.
I have heard this thing beffore but what bothers me is the risk of making fire
But with this thread i am fully convinced