I have the same problem.  gminer 1.25 works on my MSI notebook with two 1070s.  On my rig with seven 1070s, I get the "out of memory error" unless I restrict the GPUs to devices 5, 6 and 7.  I'm using Cuda 10 drivers 411.31 on the notebook and 417.35 on the rig.  Does anyone have the problem with Cuda 9.x drivers?