300 you can't, even 290 it's too much. reasonable with a farm, 260MH/1070 on lbry
a 6x platform can achieve these results:
Hi all
I wrote this article, for now in Italian, where you can check some very interesting values for these VGA's
GTX 970 Zotac Reference, with a custom heatsink from Arctic, Hybrid III 140mm (photos and details in the second article)
GTX 1070 PNY Founders Edition
GTX 1070 Inno3D TwinX2
GTX 1070 Inno3D Ichill X4
GTX 1070 Zotac AMP Extreme
GTX 1070 MSI AERO
GTX 1080 Inno3D TwinX2
I've added these data, in the charts:
http://www.xtremehardware.com/recensioni/schede-video/roundup-gtx-1070-e-gtx-1080-analisi-e-confronto-dei-piu-recenti-modelli-custom-nvidia-pascal-parte-1-2016080211648/?start=16In the tabs, from left to right, you'll be able to find a lot of interesting datas, like power consumption, reference/overclock/underclock, hashing speed, temperatures, frequency settings and RAM usage with the single ALGO.
http://www.xtremehardware.com/recensioni/schede-video/roundup-gtx-1070-e-gtx-1080-analisi-e-confronto-dei-piu-recenti-modelli-custom-nvidia-pascal-parte-1-2016080211648/?start=16There you will find the power consumption and the speed on lbry, with the 1.7.8 miner. With 1.8.1, the current one, you can expect 4% more (so multiply that value for 1.04). Keep in mind that the frequency on pascal VGA's is also dependent from the temperature, so the better the dissipation and ambient temperature, the more the hashrate (with a fixed frequency, voltage, intensity and miner version).
the 1070 is capable of working at 202MH with 81W on lbry, and 69W if the driver, due a bug, forces the VGA to cut-off the boost, forcing the default frequency with, surprisingly, the same performance. Interestingly the 1080 with the same power consumption have got a similar performance ! You can find these results in the second tab.