Since most of the posts are now becoming the same thing and blaming the miner for card(s) going down or whole system crashing until one or more cards are removed with v8,9,9.1 I figured I would try to clear this up.
There have been posts saying check your psu and such but that is clearly not getting the point across. Each version of claymore uses slightly more power so there are really only a handful of issues to check before posting for the majority of the issues here.
1. PSU wattage load
2. PSU ripple suppression
3. PSU voltage regulation at different load variations
4. Bad risers and other cables. (Least likely if still working in other versions)
5. Incorrectly configuring windows
All PSU are created slightly different even at the same rates wattage and having way more watts than you're using doesn't mean you're running your psu at a better efficiency.
If you're using a multi gpu setup you need to use a gold or higher rated PSU. The evga super nova / super flower leadex series have great ripple suppression.
Keep each PSU at at maximum of 80% load and keep it cool!
There is much more I could get into but it would require knowing each rig full hardware config.