Mining on GTX 1080ti - NBminer 27.7:

 - solo Handshake = 430 MH/s
 - solo Ethereum = 50 MH/s (sometimes only 46 MH/s)
 - dual ETH+HNS = 45 MH/s + 95 MH/s (intensity 2) = good ETH fidelity but randomly with HNS error: WARN - Unknown protocol received

Occasionally miner restart with error: No shares accepted in 30 minutes or Out of memory (after 6 hour of mining).

ETH pool = nicehash.com
HNS pool = 6block.com