Just set it to only mine ETH:

ETH - Total Speed: 56.275 Mh/s, Total Shares: 2, Rejected: 0, Time: 00:01
ETH: GPU0 26.862 Mh/s, GPU1 29.413 Mh/s
GPU0 t=60C fan=47%%, GPU1 t=49C fan=47%%

Is there anything worthwhile dual mining or is that just adding stress on the cards?