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Back to GPU mining but that quote is back 2 pages so here's a blank one
So, while I first want to express jealousy about free el. and the hardware apparently also at hand... the rest of the world works by financial return of investment rules and is bound by el prices and investment needing to be made out by themselves (and not their boss).
So for this next part I don't care if you have a full Mhs, GPU-favoured is not defined by the absolute hashrate you get. To be more clear, the cost of that 1x GTX 1080 is twice a bare-bone 1700 setup (comparison ~600 vs. ~300, both can be cheaper if you're lucky with the deals...) and then even before I OC that Ryzen setup, I have headroom on the EL consumption. Now that 35 khs is interesting, because the last time I heard that value it was for a 1080
Ti and not a standard 1080 but, let's assume I'm wrong as I don't have that card and you get 35 Khs on it.
That still means your 1080 + system overhead is marginally better than the 1700 setups.
1080 - 230W + 10Wsys (assumed 6x GPU on 1x 60W system overhead) - 35 khs@240W@600
2x R7 in mild OC - 2x 120W - ~32 khs in native linux at barely any OC - 32 khs@240@600
I call that on par, especially as I know I can push the two R7's past that 35 khs if I OC them to 4.0Ghz and whatever extra and run a clean linux. So in your free el situation I can do 36-38 khs@600 vs. your 35@600 (yes 18~19 khs on a Ryzen if you tweak the shit out of it and don't care for the whistling steam engine it becomes). I don't recommend it, but to just point out free el is working against your case.
Now, then ROI comes by for a second installment. The two R7 setups have a much higher second hand value than the 1080 after 1 year of usage, although Nvidia is currently helping with their horrible marketing strategy to extend the value a lot
, with two systems a much lower risk of loss of return is as well in play. Selling two systems for 200 min. after a year isn't that hard where 400 for a used GPU for mining becomes harder (again, that's the normal rate of price loss for GPU's which Nvidia is influencing, yet I can get them at 350 right now...).
So for any person buying, running and mining URX solely, that GPU setup isn't that favoured in hash per watt and higher in risk in investment.
At best, GPU is on-par and I would suggest you enjoy the hash while it allows GPU's to get any.
And yes there is also AMD GPU... which is so great we do not go any further into explaining this... (guess what I got....)