Hi,
After new epoch 487 my 1060 5Gb and P102-100 5Gb, have stop working. I tried different miners and only lolMiner is working. Let's see how many time still working.
Use Linux to extend your mining with 5GB cards. Windows reserve some Vram for the windows stuff - this i why not enough space for the DAG. With linux you can extend mining for month´s.
By the way - why you not unlock the full 10GB from you P102-100 card? It is possible on every P102-100 5GB and P104-100 4GB.