mid-to-late 2014, after Litecoin went ASIC and existing GPU rigs overloaded X11, profitability got quite low - and UNprofitable unless you had VERY CHEAP electric.
ETH showed up, got GPU mineable, and GPU mining got much more profitable again.

 More or less.


 

1050 Ti consumes 75 watts or less, as they don't normally have a PCI-E power connector - how much less seems to be card-specific, but usually not much if ANY less depending on usage.

 They are both GCN - it's not nearly as much of an issue as trying to mix GCN and TerraScale cards on one machine.
 Officially, ALL of the driver versions that support the RX 5xx series still support *ALL* GCN cards - back to the HD 7750/7850/7870/7870XT/7950/7970/7990 much less the R9 3xx series.
 With that said, however, I'm not convinced AMD actually TESTS their newer driver version on the HD series at all and am iffy that they test them on the R9 2xx series - the R9 3xx series is recent enough they SHOULD still be testing in those though, and most of the 3xx series used identical GPU chips to the R9 2xx series and a lot of the GPUs in the R9 3xx series date back to the HD 7xxx"GCN" series cards.


 Nvidia is another story - different manufacturer, different drivers entirely, you CAN mix AMD and NVidia but it's a major stability hit to do so, and on LINUX it's a very picky process to get them to work in the same system at all and has some serious limits on how you can do so.

Point, 63k would be more like a "small pro" mining setup.

 What is the default TDP on those cards?
 That power connection setup seems WAY overkill for a 1070.
 (Not disbelieving it exists, since 2 of you posted enough reference info I could look it up on MSI's page).


 https://www.evga.com/products/productlist.aspx?type=10&family=Power+Supplies&chipset=Power+Supply+Cable+Set+(Individually+Sleeved)

 Might be cheaper to grab a pair of the "$29.95" cable sets from that page, they have 2 of the dual 6+2 cables in each set.

9 cents / kwh is going to be VERY marginal on if you will achieve ROI on the S9 - depends on how many of them Bitmain can pump out in the next year coupled with how many competing units the competition can manage to pump out.

 I've never owned a S9, but have been told they're somewhat louder than the S5's I HAVE operated.
 They're NOT quiet.
 With that said, it shouldn't take much baffling to keep the sound getting out enough to bother the neighbors - most of it is fairly high pitched, you're not dealing with a "boom car" deep bass type of sound that's HARD to block out.

 Heat generation is easy to figure - 1000 watts of power used 24/7 is appx 3400 BTU/hour.

 S9's use somewhat more than 1 kilowatt (depends on the specific batch how much more per miner) - 20 of them is going to add up to a LOT of heat.

R9 380 and RX 570 should both work on any AMD driver version that supports the RX 570 at all, but the stability isn't going to be as good as not mixing cards that far apart on generations.

 Overclocking depends on a lot of factors, and varies a lot even within the same "GPU" as board designers do different things that can affect overclocking ability - best option is to TRY different settings, varying them only a little at a time, on one card at a time.

 Whattomine doesn't list skein at ALL on their "compare" page, so you have to go to the coin-specific page to get any data on it at all.

 With that said, it's dropped enough the last few days for the GTX 1070 that ZEC is now more profitable - but it's still VERY close, and if there is another DGB spike you might end up making more if you hang on to your DGB for that spike.

 I'm not sure where the 1080ti stands there - I don't have any (yet?) so I've not been paying attention to comparable profitability.

 The 1060 3GB and 1060 6GB apparently have different GPUS - it's not just the memory that seperates them.
 IMO NVidia should have named the "1060 3GB" as the "1055" or some such.

 It's POSSIBLE the GPU is actually the same but the 3GB card disables one compute unit (probably as a yield issue workaround), similar to the RX 470 vs RX 480 or the R9 290 vs the R9 290x.

 1080 ti doesn't need to run at 100% TDP to achieve 700+ sol/s.

 For perspective, my NON-OPTIMISED EVGA GTX 1070 SC (or my Gigabyes that factory-clock and factory-TDP higher but I have to set the TDP % lower) with nothing more than a drop in Afterburner to 80% (65%) TDP pull right around 400 sol/s at about 120 watts - and also only need a single 8-pin connector. I'm 100% certain I could do quite a bit better if I optimised them, but I usually run Skein when I crypto mine on them at all (and the optimisation for the other stuff they USUALLY run doesn't like very-low TDP).

 Folks that HAVE optimised their 1070 and 1080 cards routinely post pics showing better than 4 sol/s per watt (VERY close on efficiency to what you cite for your 1060 models), leading to a lot better density - and when you factor in TOTAL SYSTEM COST they're pretty close as well on a hash/$ basis.

 
 NewEgg still has some 1070 models listed - but the price HAS been climbing the last couple weeks, probably as a response to the AMD RX 470/570/480/580 shortage driving ETH miners into buying Nvidia cards to keep growing their farms.
 It's also possible that whatever NVidia is "stocking up for" on a new card (as reported in their last earnings call) might be impacting their production of the current lineup - they HAVE been rumoured to have a next-gen upgrade to the 10xx series in the works for a while, probably similar to what AMD did on the RX 4xx to RX 5xx small upgrade....



 I've never seen nor do I see any reason a GTX 1070 would need 2 PCI-E power connectors - even my Gigabyte high-end cards only have a 180 watt TDP, a single PCI-E 8-pin + the power draw from the PCI-E bus is specified to handle a 225 watt draw.
 I COULD see the faint possibility of a high-factor-overclock GTX 1080 going with a 2-connector setup - but have never seen one yet.

Efficiency of most power supplies in the Gold and up range is usually about 2% or a bit less better on 220V input than on 110V input.

 Not even my Gigawatt GTX 1080 models with the 180 watt TDP need 2 connectors - and since the PCI-E spec states 75 watts from the bus + 150 watts from a 8-pin connector, I'd really like to know why anyone would put 2 connectors on ANY GTX 1070. That would be a 50% increase over the "base" TDP the GTX 1070 was designed for after all.

 GTX 1080 I could see it for a card with a very high factory overclock perhaps (but I've not SEEN such a card to date), and the base GTX 1080ti needs 2.

 The cabling on the EVGA G2 1300 is heavy-duty enough you could pick up an extra cable set and use dual-connector cables in all 6 of the "VGA" ports on the PS safely.
 I don't know offhand if Seasonic sells extra cables, but EVGA has them listed on their website or forums somewhere (but they only sell "complete" cable sets, not individual cables).

 They never took the payment, so I don't count them as a scam - but the "didn't deliver the order at the price they LISTED" part makes them somewhat shady IMO.

 I wouldn't have minded the relisting *IF* it had happened before they accepted the order - it was the do it AFTER order acceptance that I found unacceptable.

 1070 pricing is on the rise too now, and availaibility getting spotty.
 Oddly enough, haven't seen any move on 1080 pricing, implying that it's ETH miners scooping up the 1070s in place of the gouge-priced AMD RX 470/570/480/580 cards they used to prefer (the 1080 isn't all that good at ETH mining due to the latency issues with GDDR 5x vs GDDR 5).

 Not a new article, and still does nothing to explain how the mining-specific card could achieve that much higher performance than non-mining GTX 1080 cards can manage.
 On the positive side, though, EVGA involvement indicates a high probability of SOME of these cards being available to small miners.

 On the other hand, Nvidia might actually be starting to feel some pressure - 1070 pricing IS climbing quite a bit, currently back near or into low-end 1080 pricing and availability getting spotty.

 wcctech has a spotty record on "upcomming scoops" - sometimes they get it right, sometimes they blow it entirely (like the RX 490 they were talking about a couple months or so back that never happened).
 There have been a few different sources on the GP106-100 though inplying that SOMETHING is going on there - the GP104-100 still seems to be going back to one or 2 root rumor sources, but it would be nice if it DID happen.

Found and fixed my issue with the units that wouldn't upload - and I am BACK.

 8-)

 Delivery mid-to-late September - and priced in Litecoin, which is a change for them but does make SOME sense.
 They had that batch up yesterday, but it was priced originally in $ - unfortunately I didn't pay close attention to how much $, so I dunno if they jacked the price when they changed to the Litecoin pricing or not.

Which doesn't stop Bitmain and other mining ASIC makers from selling miners with a 3 month OR LESS warranty to customers worldwide.

 Some GTX 1070 cards have as high as a 180 watt TDP.

 (edit) if that's the MSI 1070 model with an 8-pin AND a 6-pin the TDP appears to be 230 watts, per discussion in another thread.

 I'd recommend going with a good-quality 1200 Watt or higher - EVGA G2 1300 or Seasonic X-1250 gold would both be good choices.

 Platinum and Titanium are more efficient, but the MUCH higher cost tends to take too long to pay off unless your electric cost is VERY high (and in that case you're probably not going to be very profitable in any case).

If you are going to run Linux, your ONLY choice is to run the RX 570 as the primary card and the GTX 1070 as the secondary, due to how the drivers have to be installed to "mix" both.

For Windows, it shouldn't matter.