GTX 1060 Palit 3 GB GPU0 in the picture giving me almost 260 sols with less than 80 watt consumption. Nowadays especially here in Italy with the electricity price of 0.16 Euro kwatt power efficiency is the thing miners should worry most about. I don't worry anymore. Soon I will build another Zcash miner with 5 x GTX 1060 and only 500 watt total consumption together with the motherboard. GPU1 if you are wondering is GTX 1050 ti and is using only 60-62 watt consumption.
What zcash miner are you using that displayed this watt consumption?
My Palit GTX 1060 Super Jetstream managed to reached 320 sol/s but it consumes 100w.
My setting is Mem: +450 GPU: +110
Maybe he is with stock clock 260sol/s and you're with +110 overclock at 320sol/s.