could some of you guys put the price and roi estimated of this relation ships of this ant miner s4 and s5 it seems it takes like 8 months to roi and the watts my god sorry my mining skills are not that big
you will never ROI the S4+ or S5 unless you have other miners to help. unless you have completely free energy.. then it will take like 215+ days.
at this point it is best to buy BTC and hold it.
Because maths:
At free electricity, flat difficulty, a price of 230/coin, 100% average pool efficiency and no pool fees:
It takes 118 days to ROI an S5 (ETA .369BTC/month @1150GH/sec)
It takes 153 days to ROI and S4+ (ETA. .82BTC/month @2570GH/sec)
At .10 USD per kw/h, flat difficulty, a price of 230/coin, 100% average pool efficiency and no pool fees:
S5: Cost to run: $43.00, earning $85.00 = ~$42/month in earnings, taking roughly 9 months to break even.
S4+: Cost to run: $108.00 earning $188 = ~$80/month in earnings, taking roughly 12 months to break even.
The only real value the S4+ has over the S5 is that you don't need to spend money on a PSU/cables, but I feel the price that Bitmain is asking is way outside of reasonable for that hardware.