Endless run again
Just want to show that possible reason of endless benchmark run. I have 1 "unsupported" GTX 980, but why benchmark runs with 0,1 (two) CUDA devices?

![wrong-number-cuda-devices](https://user-images.githubusercontent.com/36886126/37563797-a85ca228-2a99-11e8-8e1c-9faa4987f4d1.png)
