Why the "blanket" statement?  It may not be profitable for "you."  Does this mean it's not profitable for anyone else?  Like in another country, maybe?  I can tell by your local time and your estimated cost for customs fees that you are located in Europe.

1 BTC for "customs fees?"  Really?  WOW!!!  No wonder you don't want to buy S7's.  I can imagine your power costs may be substantially more than many of us in the US as well.

By the way, I also have my own PSU's for over a year from mining with previous rigs I owned well before the S7 was available.  They were $65.00 USD each [With free shipping] and two of them can power 5 x S7's very easily.  Do I have to buy new PSU's?  No, I don't.  I will have to buy more PCI-e cables to power them @ $3.25 each.  That is 7 x 16 AWG PCI-e cables for each S7 = $22.75 USD (0.07 BTC).

I have enough PSU's at present to power 54 x S7's.  Will I need to buy more PSU's soon?  Yes, I will.  Even if I do have to buy more PSU's with breakout boards soon, I can get them at $65 USD + $65 for breakout board = $130 USD (0.39BTC) for each .  Don't forget that each PSU I use can power 2.5 x S7's.  So, if we divide 0.39BTC by 2.5 = 0.156BTC costs for PSU for each S7.  0.156BTC + 0.07BTC for PCI-e cords = 0.226BTC

So, 0.226BTC my costs for PSU to power 1 x S7 compared to your 0.487BTC for PSU with PCI'e cords is more than double my cost.  

I have no "customs" fees.  I have the occasional brokerage fee of $29.00 USD to $69.00 USD depending on how many units were purchased.  Many times there is no brokerage fee at all.  It depends on whether I'm one of the lucky ones to be chosen among all the packages coming through.

So, try 4.73BTC for S7 + 0.226BTC for PSU with breakout board and PCI-e cords = 4.956BTC + 0.155 for shipping = 5.111BTC for me in the US compared to your 6.217BTC in Europe.  

But remember, the first 54 x S7's I purchase do not include the additional costs of PSU with breakout board and PCI-e cords.  Which means the first 54 x S7's for me would be 4.73BTC + 0.155BTC for shipping = 4.928BTC for me compared to your 6.217BTC.



Yes, I know your calculations are with FREE electricity.  However, the cost per S7 for me is 1.106BTC cheaper than yours IF I had to buy PSU's with PCI-e cords and breakout board.  My costs for the first 54 x S7's are 0.226BTC cheaper than that, seeing that no PSU's are required.  Which means 1.332BTC cheaper than your costs for the first 54 x S7's.





Oh really?  So, it's okay for you to "buy" your BTC and speculate on price?  Yet, we who mine BTC, cannot speculate the price of bitcoin will increase just as you speculate?  We who mine have to assume a stable price (flat line)?  If that's the case, "you" who "buys" BTC has to assume a "stable" price as well and thereby not make one cent in profit cause you too would have to assume a "flat line price with no increase."  Why is it that we (who mine) cannot speculate on our investment and you (who buys) can speculate on yours?  

The rules you have placed on miners are disingenuous.  Both buyers and miners can speculate on price when investing.  We are simply investing in a different "means" to accomplish a similar "ends" ...  RETURN ON INVESTMENT WITH PROFITS.

We (who mine) are "buying" BTC just as you are buying BTC but in a different way.  You (the buyer) and we (the miner) can BOTH SPECULATE on an increase in price of BTC.  I'm speculating the price of BTC will increase at a percentage rate much higher than the percentage rate of difficulty increase over the next 9 months.  Just as you (the buyer) speculate on the price of bitcoin as well with Elliot Waves, bullish or bearish news or by whatever means you use in your speculation to have not only a return on investment (ROI) but gains to boot.

Is my speculation a bit more riskier than yours?  Yes.  However, where there are greater risks can also result in greater rewards if speculation for those greater risks come to pass.

Have you seen this one?  

https://bitcointalk.org/index.php?topic=569924.0

EDIT:  You may still need to use Teamviewer to reboot.

Rich addressed this in an earlier post, which see:

Thanks for your input, Rich.  It's much appreciated!!!

Thanks for the info.  So, my going manual now should do it.  Sorry to hear about your rig and the delays you will have to contend with.  I hope it gets worked out for you soon.

I doubt that very seriously.  It's possible [after assembly] they keep rigs that meet certain parameters.  If I owned BITMAIN, I would keep rigs that met certain parameters as well.  Wouldn't you?  Does this mean all the rest are trash?  No...

I prefer the batches with more strings that results in better power efficiency rather than the 4.0 TH rig with fewer strings and less power efficiency.  I know it says batch 6 is the same .25 watts per GH/s.  However, I have to see it to believe it.

I've decided not to take any chances.  I've put most of mine on 60% fan speed.  I put 3 of them on 70% because their temperature was a bit warmer than the others when set to 60%.  I would recommend everyone else do the same.  It's better to be safe than sorry.  Especially, once the 90 day warranty passes.

Totally agree.

And yes, you make a good point with the cloth insulation on wiring in much older homes.  That's also why I was mentioning the word "heat" several times.  I'm assuming people would feel the outlet for the heat I mentioned.

I'm curious...

In a typical single family home in Europe with 3 bedrooms and 1 or 2 baths, is there normally 200 amps available in the Main Service Panel?  Also, are the breakers pretty much similar to the U.S.?  Meaning, do you have 15 amp breakers on 14 AWG wiring, 20 amp breakers on 12 AWG wiring, 30 amp breakers on 10 AWG wiring, etc...?

If you are talking about circuits inside U.S. homes, 15 amps x 120 volts = 1,800 watts.  A 1300 watt rig would consume 72.2% of an 1800 watt/15 amp circuit.  That's approximately 3% under the 75% recommendation by the NEC for a 15 amp circuit with 14 AWG wiring.  

If they have other devices (lamp, clock, etc...) plugged into other outlets on the same circuit, there will not be as much heat as you might think at that one outlet the PSU(s) is plugged into when powering one S7.  Most of the heat would be at the breaker in the Main Service Panel (MSP) while the current is distributed to multiple outlets for that circuit.  It is the circuit breaker that would be at fault of any potential fire [For not tripping].  You are mistaken if you think the PSU(s) and rig would catch on fire for pulling only 72% of the available current for that circuit.

Even if the circuit is a "loop" circuit instead of a "branched" circuit [with the rig being the first device in the loop] there could potentially be quite a bit of heat at the outlet the rig is plugged into.  Yes, in that case, there would be a lot of heat at the breaker and the wire leading up to the first outlet in the circuit.  Then less and less heat for each outlet after the first in the loop, providing the rig was plugged in the first outlet in the loop closest to the breaker.  Is this the fault of the rig?  No...  It's the fault of the owner if old defective wire catches fire.  It could potentially be the fault of the manufacturer of the breaker under certain circumstances.

As the customer plugs in and turns on more devices at different outlets on the same circuit, the circuit breaker should trip once 15 or more amps flowed on that circuit.  If it does not trip and a fire is created, it will not be at the outlet where the rigs are located.  It would be in the MSP where the defective breaker is located.  This is assuming the wire gauge in the home is 14 AWG.  If the wiring is old in the home, that's the home owner's fault for running devices on defective wiring.  It's not the manufacturer of the device fault.

It is my opinion that one should proceed with caution when mining with multiple S7's.  In that case [Multiple S7's] one should consider creating a space with circuits dedicated just for the rigs; preferably with a 240 Volt circuit(s) and PDU's or whips.

I believe that's the reason it is priced in BTC.  BITMAIN, believes the price of BTC will go up instead of down.  Hence, pricing it in BTC like they did with the S1 when the price of BTC was high.

Yes, they do run like a champ and very quiet too compared to most!  Having them as a lottery rig on CKSolo pool is probably not a bad idea with an S3.  I kind of wish I kept one now just for that.

I already did this when I first got them to reduce a high pitched sound.  This new sound started after my internet connection came back on line and they started hashing again.  It's like the wind sucked in the fan is whistling as it goes between the fins of a heat sink towards the front of the rig.  If I held my two fingers up at the bottom center of the front fan, the whistle went away.  So, I put a small piece of tape in that one spot to stop the whistle.  It's weird...  I'll go back downstairs after a while and take it off to see if it continues whistling.

I've sold 44 rigs on eBay.  The last one was sold and shipped the first week in September.  I sold 18 x S3's, 15 x SP20's, 5 x S4's and 6 x S5's.  All but one S3 sold according to schedule.  I had to re-list it because the buyer did not pay.  It has been 45 days for most of them now.

Well, today was the first time for my internet to go down since I've had my Batch 1 S7's [9 in total - 10th on the way; it's a batch 5].  My internet was down for approximately 20 minutes while a technician was working on the main line in the neighborhood.  All of my rigs began beeping shortly after the internet went out and beeped the entire time until the modem was back online.  However, one of the nine S7's had a red light and was not accessible from the browser.  It began working properly after I turned off the PSU and turned it back on.  All are hashing properly now.

So, all in all, I'm well pleased with all of my batch 1's.

EDIT:  I do get a whistling sound from one of the S7's.  I've put a piece of tape over a small portion of the fan at the bottom and the whistling stopped.

Really?  You're not even buying bitcoin anymore?  It's easily going to $700 [Minimum] in my opinion just before the halving.  Even if one thought it was going to $500 or $550 minimum just before the halving, it's worth buying on the next dip and hold until it gets to $500 to $550 [If one has the funds to spare in buying it].

Mining is just as much of a speculative market as the exchanges are when speculating on price.  I imagine some, if not most here, are "speculating" the price of bitcoin [Over time] will increase at a higher percentage rate than the percentage rate in which bitcoin price increases.  That's what I'm speculating.  I have my reasons for investing more in rigs than buying BTC alone.  We will see over time if my speculation is right.  Although, I must say, I have plans on getting to cheaper power costs soon as well.

My guess will be by the end of November we should see another batch or two up for sell.

You have a point there.  Good thing I have 3 personal accounts and 1 business account.  I only transfer what funds that are needed for the account used with PayPal, grocery shopping etc...  I'm about to have very little in the bank at all come next year.  It's just a matter of time before the world economy goes to hell in a hay basket.  That's when we have a run on the banks.  I don't plan to be part of the one's running to the bank.   

I believe I will have to do as you advise with the bank account.  Could you give me an example of you may have went through to no longer give them free reign of your bank account?

Thanks for your input.