Hello there,
I found a weird solution for my constant crashing video card driver. If you want to use Open CL, the manual says that you have to reduce the number of CPU cores by one for every graphics card that you plan to use. I could solve my crashing driver problem by reducing the core count by two, instead of one. The CPU-load is still at almost 100%, but the driver doesn't crash anymore.
Hardware:
Core i5-3570k
GTX 970 (368.39)