For a miner in my home am I better off with S5? I am afraid S4+ is to much.
Which one should I go for?
at this point in time if you dont already have any dont buy any.
nothing you can buy right now will make you any profit. even if you dont pay for power its still not worth it.
if you are absolutlely set on getting a bitcoin miner, you can find a used s3 cheap.. they are usually around 70$.
a s3 will net you just over 1.10$ per day at stock speeds. keep in mind it uses about 370 watts at the wall.. so you are looking at a cost of .88 cents per day at .10c per KWH.
BS
The S5 does generate a profit. I have bought 3 and ROI on ~1.5 already. I do not compare to dollars only to
BTC. I bought one in January and two more in early March. I pay 9.2 cents per KWH for juice too. If you are using them inside they are loud unless you mod them with fans but you give up your warranty when you mod. My earnings from AntPool as of right now are 2.25 BTC but I have earnings from a variety of other pools too that would bring the total to ~2.9
BTC. Too lazy to go dig them all up.
All 3 are still in great working order so I could cash out on eBay and have a tidy profit.
Good luck.
lets do some math here..
1 S5, cost for me to have shipped, 388$.. todays price that is 1.597 BTC
1 S5, on the most luckiest pool will earn 0.01214 per day or 0.3642 per month at stock freq.
so, with NO POWER COST it will take you, 131 days to get your btc back..
you say you have 9.2c power costs.. so now we are looking at.. a COST of $36.48 PER MONTH..
now we are going to factor in a cost of btc per usd at 250.. altho its been lower than that..
so thats a power cost of 0.14592 BTC PER MONTH..
so our ROI of 131 days turned into 223 days..
since every 14 days or so the difficulty is going up.. we have gotten lucky the last few times but you cant guarantee that.. we are looking at 16 difficulty increases..
so say even if they are 3% it would significantly lower your monthly rewards and increase your ROI
also i didnt factor in a power supply.. a good 80+ gold psu will set you back about 100$.
so i guess if you buy a s5 right now, and you have no problems with it and it runs stable 24/7 you will be ok. even upwards of around 11c per KWH.
factoring in 10c per KWH the difficulty point where it starts costing more then it makes is.
for the s5 is around 106000000000
and for the s3 its around 65000000000