I have 6 Zotac Mini GTX 1070 (Asrock h81 BTC r2.0 / Thermaltake RBG 850W Gold / 8GB) .

My best efficiency for ETH is:

• TDP: 63%
• Core: +0 (1300-1500)
• Mem: +400 (4200MHz)
• Fan: 80%
• Miner: Claymore v11.5
• Driver: 391.01
• ambient temperature: 17°C (62,6°F)
• card temperature: 43°C-53°C (109,4°F-127,4°F)
  
• Pool: ethermine
• MH/s: avg. 175
• Wall: 650W