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

My best efficiency for ZCash is:

• TDP: 65%
• Core: +50 (1580-1607)
• Mem: +200 (4000MHz)
• Fan: 80%
• Miner: DSTM 0.6
• Driver: 391.01
• ambient temperature: 17°C (62,6°F)
• card temperature: 43°C-53°C (109,4°F-127,4°F)
  
• Pool: flypool
• sol/s: avg. 2500
• Wall: 680W