Somehow the idea of Preev+5% seems to be unclear.

Lets say bitcoin is 50,000 on Preev. I will pay 50,000+5% so 50,000*1.05 = 52,500

If I pay 52,500 I get 1 bitcoin.
If I pay half I pay 26250 I get 26250/52,500 = .5 bitcoin.
If I pay 5250 I get 5250/52500 bitcoin =  .1
If I pay 5000 I get 5000/52500 bitcoin = .0952381

This all will seem obvious, but how can you use Preev to make the math simple?
When I pay 52500 I am paying 5% extra on the price of Bitcoin. So even though I am paying 52500 I am getting 1 bitcoin only.

This means that for the price of 1.05 bitcoin I am getting 1 bitcoin.

If you use preev to add 5% you have to increase the bitcoin amount to 1.05 thats the selling rate in rupees for 1 bitcoin. Then you take out your calculator and divide 5000 by the selling rate to get the fractional bitcoin amount.

He wants to sell at Zebpay rate - 1000 (higher than Localbitcoins). He could buy from Coinsecure and sell to you and make $$$ all day long. I can offer the same deal myself

I offered Preev+5% but he is not accepting it seems.

Nice call, hash rate is above the price of buying an s9, but its dropped quite a bit. So it seems like now is a good time to buy and then when the stock runs out sell the hash rate?

Cars depreciate because of wear and tear, warranty runs out etc. I don't see any real difference between buying hash at the datacenter vs buying my own miner. Can you show me how 1Ths/ of new is different vs. what I buy on the market?

Can you allow one to adjust what the maintenance cost of s7 and s9 is? Thanks

What % is this if what you were investing or how much has were you buying and selling to get this?

Ahh that makes sense, thanks for clarifiying with examples

In terms of Pacmic v5 and autorebuy what is your opinion? It seems like you have 6THS for 1BTC but at current prices you can get 6.6THS if you buy the S9 hash on the market. In Pacmic you don't pay maintenance but you don't get to keep your hashrate at the end of the contract. I would assume even with maintenance it would be better to just buy s9 hash on the market?

Also in terms of Pacmic how does the autorebuy work in terms of paying back the capital. With one contract on autobuy lets say I get up reinvesting .05BTC of my profit into hashrate. The contract will then terminate when I am paid back 1.05BTC?

Edit: Also one more question, is it possible to switch to Kano.is pool using Hashnest?

What you are saying makes sense but what I see are basically the same payouts (small variation) but hugely varying maintenance fees. Sometimes the maintenance will be 2x the payout. Recently the last day or so there has been a lot more maintenance charges that have been more than the payout (per payout) if I average all of these transactions I get 75%+ maintenance in the last day or so. Is this how they do it? The payout is fixed per GHs and they vary the maintenance to compensate when they are unlucky?

Recently the maintenance on s7 looks to be 75% and above.  This puts s9 above s7 from what I can tell. Is this just general variability or is it creeping up? It should stay the same until the next difficulty increase right?

This is what I wrote earlier, but no one replied with numbers. I don't feel like a lot of people here have done the math.


As far as I can tell neither will earn money more than what you spent. After spending some more time looking at how much maint the S7 is, I see some large maintenance charges added every so often. Whereas before maintenance was working out to 20% of the payout for S7. Now with these large charges its 50% of the payout, so S7 doesn't look as attractive as it did before, but its still better to buy S7 over S9 based on the price/hash difference.

I notice that prices have gone up in the last 24 horus. Is this because of the BTC continuing drop?

Thanks for the reply, I am definitely missing something. I put in equal bitcoin into S7 and S9 hashes. I was able to get 2.3 times as many S7 hashes. Even with the higher maintenence fees I am getting 2x the bitcoins from the S7.

From using the numbers on the calculator, it looks like in 2 months they should give equal bitcoins. After 3 months the S9 should be ahead, but for now S7 seems to work out.

What do you think is wrong with the statement I made? Which child subforum are you suggesting

Edit: I think I misunderstood what Jessica's was saying. S9 is 2.29 times more expensive in terms of hash cost but only 2.09 times more expensive in terms of maintence. Where does the thrice come in? You can buy more s7 hash but you will pay more in maintenance at least from the numbers that HashNest is giving. Anyone can give any other numbers?

Thanks, basically you are saying 1THs on S9 is not the same as 1 THs on S7. In terms of doing due diligence thats what I was trying to do with the calculator. If I could get some actual S7 numbers I can figure out if its worth it in the long run. Clearly both will give money, the question is will they generate enough bitcoin to pay for the hashcost.

But isn't the s7 maintenance cost more than double of the s9? Can someone show a screenshot of s7 and s9 earnings and maintenance cost?

When I run it through bitcoinwisdom mining calculator, they are both unprofitable over time but the s9 is closer to breaking even.

https://supload.com/rJL7uGurl

If I look at the market hashrate for S9 its coming down and S7 is going up. I have seen posts where people say there are getting more bitcoin from S7. From running it on the calculator as the maintenance costs are higher you will do worse with the S7. It looks like PACMiC is profitable, but it depends on how much profit they give you.

Anyway I think your cost was slightly more than what I calculated. So you pay $14 but make $12 after a year.

I fixed the image link. You make money, but the money you make won't cover the initial cost of the hashrate you are buying. So I am spending $138 but I will never get the $138 back because the difficulty will increase after 20 months making it unprofitable to run. After 20 months I make $134. I would assume at that time I can't resell the hashrate for much of anything. It seems like the key is to just buy and sell the hashrate.

After 1 year I would still be down $20, but I would hope I could resell the hashrate for more than $20.

If I may ask, how much did you pay for your 100 GHS and how long have you had it?

Also is the electricity part of the maintenance fee or is it separate?

I was looking at Hashnest and buying 1 THs of S9. I am a little unclear on the costs that they will charge. I see they will charge $.21 USD/THS/Day maintenance. Power is rated at .115 W/GHS, so 1THs will mean 1150 W. I don't see a separate electricity fee on the site, so is it included in the maintenance?

At the current bitcoin price and going rate, it look like 1THs of S9 will cost $138. If I assume 3% difficulty increase and 2% mining pool charge I don't see that you can make money on this according to Bitcoinwisdom calculator

https://i.supload.com/rJL7uGurl.png
note: in the calculation I took the daily maintenance and divided it by 24 and stuck in the electricity cost and used 1kw

Am I missing something? People seem to say going with Hashnest is a good idea, but with the current cost/maintenance fees you can't make any money from what I have calculated (and this is assuming electricity is part of maintenance fee). Please let me know if this is correct.

Can you help me out a bit on the math here? I'm just starting to look into mining. You have 5 S9's and an S7, are they working ok? It seems like 68TH/s is correct but if you are only doing 56TH/s is there a problem? Also you mentioned $8k, did you get a special deal on the S9's? Did you have an S7 previously?

If I stick this in a mining calculator as $8000-$2400 for your cost then at 3% difficulty increase you will recover your cost and make $12.6k ($6.3k each) at the end of 2019. At 5% difficulty increase (the next difficulty increase is 7.75% so I am just sticking 5% in as an average), you will make $6.3k ($3.6k) at end of 2019. I've attached the screenshots, let me know if I have made any mistakes.

As you are in with your friend, I assume if you sell the miners you would split the sale or what would he do with the solar setup if there was no mining?

Thanks for providing some light on the details of setting things up!
https://supload.com/HJ4JyMurl