@Claymore
Rig 6xR9 390 1150/1500
v.1.0 - v.8.0 - 0 crashes for all the time.
v.9.0/9.1 crashes each 10-15 min, various GPUs. (any -i value)
Something is wrong with this version.
Rollback on v.8 returns stability.
Again and again.
Problems can be:
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
Answer to myself, maybe be helpful for someone.
The problem was in Radeon driver. If all of previous versions worked fine with v. 16.10 (including Claymore's ethereum miner), the version 9/9.1 in some configurations (including my 6xR9 390) works only* with drivers v. 15.12.
For sporting interest, made few clean re-installation to purity of the findings.
310 h/s from 1 GPU (-i 8 ) now.
2. Tips in 1-5 - utter nonsense and completely useless demagoguery. Only misleads readers.