A few observations on hashrates and power usage based on my 3-4 months mining with 19x GTX 1070’s. I’ve had EVGA cards of various varieties (SC, SC2, FTW, FTW2, FTW hybrid, Black), a couple MSI Gaming X, a Zotac mini, 2 Gigabyte G1, and a Gigabyte Xtreme. All open air dedicated-mining rigs with all new components.
The EVGA’s provide the best hashrate/power usage. Of them, the FTW varieties (both hybrid and non-hybrid) do the best (440-450 using 110W). Non FTW EVGA’s consistently get 420-430 using 110W.
The MSI and Gigabyte use much more power to get near 450 hashrate, around 140-150W or more. Lowering power limit lowers hashrate close to 400 to get to 110W usage. Zotac mini was the absolute worst and could never go higher than 420 at max power, and below 400 at 120W. Zotac also ran 20F higher in any condition than all other cards.
I’ve spent considerable amount of time playing with processor and memory frequencies, power limit, and even voltage/frequency curve. The voltage/frequency curve made a difference but it was impossible to find a setting that didn’t crash the miner. Very touchy.
Interested in other experiences on this.