Sounds the same to me. For Hashnest, some people claim that the S4 is more profitable than the S5 by the way, so you might be able to squeeze out a few more percentages out of it, depending on BTC value.
It seems the S4 are all sold out.
Only S5 are available
I hope someone shares their numbers, then I will decide
Where can I find an S5 contract? I only see the PACMiC V2?
You can either by a PACMiC V2 or hash from an S2, S3, UMISOO, S4, or S5 which can be found by clicking Hash, then choosing the hash from the version of miner you want. So if you want to buy 1000 GH/s of S5, go to Hash, click S5, go to market and put in a buy order for 1000 GH/S.
Thanks. after comparing, it seems to me, that pacmic has less risk guaranteed roi, while something like s5 is higher risk as it depends on the difficulty and risks becoming unprofitable. right?
Unless if I misunderstand the pacmic revenues:
0.0000000045 *60 * 60 *24 = 0.0003888 the first day
You almost got the PACMiC revenue right, you also have to take it times the remaining principal. So towards the end of the contract, you are earning very little profit.
so at current difficulty, the revenues that go toward the 1 1btc cost of the 1000 GH/s contract with the $0.098 kwh cost, according to coiwarst profitability calc the daily revenue would be 0.01056774 btc that goes toward the 1 btc investment and it would ideally break even in 93 days, if difficulty remains the same
therefore the daily discount rate of investment would be 0.01056774. every month 10.57% is paid towards balance
so the 0.0003888 every month gets decreased by the rate of (10.57%) for 93 day.
since we know the bonus will be paid for 93 [EDIT: days], we can start from the 93rd day and go backwards.
Effectively the the bonuses would be the sum of 0.000388 * (1+ 0.01056774) from day 0 to 93. Therefore using the future value formula:
Future bonuses = 0.000388 * (1+ 0.01056774)^93 = 0.00103137 btc that's 0.103% profit on the
the average daily profit would be 0.00103137 / 93 days = 0.00001109
[EDIT: I must have a mistake here... u can get this amount from faucets
]
[EDIT: OK, the above is wrong in different levels. It should have been 0.000388 * (1+ (1 - 0.01056774)/93)^93 since the bonus keeps getting decreased by .010, but its still wrong because this is assuming a block is found every day. If the pool is supposed to be 5TH then according to coinwars a block is generated every 0.2 days which is 5 times a day.
The correct equation should be: 0.000388 * (1 + 0.01056774)^(5*93) = 0.05149402 for all 93 days. Thats a total of 5.15% in the 93 day contract. Makes more sense.
so the average daily profit is 0.05149402 / 93 days = 0.00055370 BTC/day]
Now the S5 burns 0.51/GH according to hashnet, its 1155 GH are 589.05W and hashnet charges $0.0976/kWh.
Inputting this data on coinwars calculator, with the same exchange rate and difficulty,
the profit per day is $1.44 or 0.00427719 BTC with the current USD 233.7979 exchange rate. so in 93 days the profit from revenues should be 0.39777867 BTC.
It would break even is 268.06 days to generate our invested 1.1465435514, and start generating profit of 0.00427719 daily
all this is however assuming that difficulty and exchange rate doesn't change over time...
If the drop of btc price continues to drop at the same rate it has been, we could take an educated guess on how much is the btc gonna be worth after 286 days:
if todays price is $230/btc according to coinbase, 286 days ago on August 30th, 2014, coinbase price was $504/btc
Thats percentage drop of (504-230)/504 = 0.54365079. Note that the curve is kinda stabilizig, so assuming a continuous straight line drop is being extreme and over-safe (worst case scenario).
so the worst case scenario would be that our break even btcs would need to increase by 0.54365079 more than 1.1465435514
so 1.54365079 * 1.1465435514 = 1.76986286 BTC
and proportionally our break even days would also be 286.06 days * 1.54365079 = 441.58 days
and the daily profits would actually be worth less by (1 - 0.54365079) * 0.00427719 BTC = 0.00195189 BTC
Thats is still much more than the PACMiC V2, but there would but if I am not mistaken, there would be the risk of never breaking even, if the device becomes unprofitable before the 442.58 day worst case scenario...
Unfortunately I still consider myself a newbie and am still not sure how and why the difficulty changes...
Can anyone verify the math? And can anyone make anything out of my results?