RE: Asus Nvidia GTX1070 Expedition Mining card
Nice to hear that @junglist and great question. Are you planning to add any card in the future? As for the 1070 vs 1060, I'ts actually something I've been thinking about for the last few days and I'm torn.
1070 is in general 90 to 100% more expensive compared to the 1060 3GB but only offers like 60-75% more horespower when it comes to mining so in theory you would get more out of it by buying 2 1060 from that perspective. The only reason why one should consider 1070 instead of a 1060 would be if you have limitation on physical space to put the card. With that i mean if you have a dedicated mining rig that can handle 6 cards you have a lower overall income with the 1060 but get your ROI back faster compared to the 1070 but you will get a higher profit after the longer period of time it takes to generate the ROI for the 1070.
Another reason to go with 1070 would be if you are like me a gamer who also games but want to be able to mine when not gaming, then I would recommend the 1070.
I could go on forever talking about this but this is my view at the moment.
I'll probably build a dedicated rig pretty soon, from what've read the 1080s mine about 100%+ what you would get from the 1060, I'll likely get one of those for my main gaming rig and relegate my 1060 to a mining rig and get it some friends to hang out with in the rack. I'm thinking 4 1060s to start with as a dedicated rig, if you're not too fussy what you mine seem to be on par with the AMD 480s.