I'm having the "0 mh/s then crash" problem with my rigs running RX 470 cards regardless of whether I am running Claymore 9.4 or 9.5. As I noted in a previous thread, I was able to get the issue to subside by reducing memorcy OC settings by 125 mhz. However, prior to a couple days ago, I was able to run the more aggressive memory setting for months without an issue.

If you want me to bump the memory OC setting back up to what it was before so you can observe the issue on your end, just let me know. I would be happy to help.

EDIT: Also, a couple times before the a card dropped to 0 mh/s I noticed its reported hashrate jumped up by as much as 3 mh/s for a brief period of time before crashing. Prior to this new issue with stability, I had never observed any cards on my rigs doing that.