CUDA Error on GTX 980
![screenshot 273](https://user-images.githubusercontent.com/7335216/32937498-1ea88df0-cb79-11e7-8e5a-9faccfdd72ca.png)

[CUDA] Error gpu 0: <cryptonight_extra_cpu_final>:231 "unspecified launch failure"

what does this imply and how to fix? 