2 Claymore
gtx1080tis are here, driver 425.31
-strap 1 - low 40+ hashrate, but system is stable
-strap 2 - need to apply only with std mem clock. Can raise mem clock after miner started and reach fantastic 56.5mhz but if miner closes then system crashes. Need to lower mem clock before exit.
I have my P2 cuda states disabled by the way to prevent memory clock spikes between different P-states switches.
-strap 3 - system crashes even with -502 mem clock.
So, it looks promising but unusable. Get back to EthPill and 55mhs stable and no crashes when miner starts or exits
2 Claymore.
I think you should rework the way you do miner exit on gtx1080ti's with straps applied. I found a trick how to fix your timings and than run your miner without strap management.
It keeps high speed of modded timing and doesn't crash system on exit.