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Bitmain by increasing their price will cause sales of sp20 to go up.

here is the reason:
3 s5 to the usa cost $1140
performance 1150 GH/s

$ per GH/s 0.33

for the s20 since shipping is free total $1200
performance 1700 GH/s 0.23

much better performance per dollar.

in terms of electric efficiency, since basically they cost about the same after shipping $380 vs $400, it would be fair to compare them at the same performance, the sp20 undervolted to provide 1150GH/s would probably give similar consumption.
Someone with an sp20 would provide that info.

But after the price increase for the S5 the SP20 is a much better choice, I am sure bitmain will be force to drop their prices in less than a week from now.

if we use the $ per GH/s ratio of 0.23, for the S5 to be able to compete against the S20, the S5 would have to be priced at $264 including shipping, but since it does not include shipping it would have to be priced at $224, at nearly double this price it is no match for the SP20, I was hoping bitmain would lower their prices against the competition, but instead they were increased, this is a very bad indication that they are loosing ground. I would think in less than a month assuming spoondolies does not lower their price would have to be prices around $200 otherwise spoondolies will get all the sales, now if spoondolies lowers their price, the sp20 will have all the market for themselves at least for a while.

I am comparing in a group of 3 since that is something that most miners could do easily and provides best price for sp20, for the S5 the group is 52 units which is way to large for most of us.

even at the new price, it still never ROI for anyone with + $0.1/kWh

Do most ppl here know there is electricity rate and there is effective rate?

Effective rate is what you should look at. It includes delievery charges + electrical rate.

bitmain dropped to 310 usd