I have problem with Claymore miner. With 3 GPU GTX 1070 8GB everything is OK and stable. When I add 4th GPU GTX 1070 8GB, miner starts to restart itself and giving me error CUDA ERROR 11 - CANNOT WRITE BUFFER FOR DAG. First I thought it's GPU fault  and put new one with 2 old one and everthing is OK. Every combination of 3 GPUs is working, except when I add 4th one.

I increased virtual memory to 16GB and checked free disk space (71,6 GB).
I'm running on Windows 7 64-bit, with 4GB memory.

Could be problem in RAM or disk space ?

Please, for solutions, beacuse it's very little about this error on net.