I recognized, that v9.7 pushes the Hashrate quite a lot. On single mining ETH, hashrate is pushed from about 180 to 185 on a 1070 RIG, memclock set to +600, Core +25, Power 70%.
After a short period of time PC hangs. With reboot -1 option, PC starts again and continues mining.
I had to pull down Memclock to about +400 to get system stable when using v9.7.
So i went back to 9.6 to get no bad surprises. I think v 9.7 is still not stable for a longer run.