ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH

[alienesb]

we should have a big earthquake in china and it destroys all those giant mining farms then things will be much better who cares about human life's you rich guys don't.

Dude you got issues. Maybe you should have saved up some of those coins from the past and you wouldn't be bitching so much now.

[philipma1957]

There seem to be many smart people in this forum.  Can someone verify my thoughts?

Situation 1:
I would like to confirm this: I have many 750W Platinum PSUs and would like to use 3 750W PSUs (one for each hashboard) to run 1 S7.  I do realize that it would only take a 500W PSU, but I have 750W PSUs.

Situation 2:
Next: there are 3 hashboards at 400W each making the total for ~1210W.  Utilizing VA=W, this would come to 3.6A each hashboard x 3 hashboards = 10.8A for the entire S7.  This would keep it under the 80% utilization of a 15A circuit.  Does this sound correct?

you should be fine with both 1 and 2.

a 15 amp circuit should be able to do 1500 watts 24/7/365

[notlist3d]

Currently selling 2 100 dollar coupons - https://bitcointalk.org/index.php?topic=1171394.0  SOLD
 
I have given half of mine away for free, even one that was likely sold after.   So selling these two to go twords my lotto machine build.  They were not really "free" as I paid around 3k for S5+ miner, PSU's, and Shipping.

[QuintLeo]

OK, just made one last RoI calculation estimate, and it appears there is no way I'll ever get RoI on a S7.
 (my move plans took a bit of a hit, looking like next summer now instead of the end of Nov I was originally aiming for).
.....

 

.....

 S7 is a vastly better product, but unless you have VERY cheap electric you won't RoI an S7 unless bitcoin price jumps a LOT sometime in the next 6-8 months, or difficulty increased flatten back out to even LESS than the 1.6% they averaged during the first half of this year about immediately.

This is not true.

 It is. Do the bloody calculation. Don't forget to add in cost of power supply(ies), don't ignore difficulty increase (I assumed 3% but that seems to be VERY OPTIMISTIC based on diff increases since Bitmain started the "Used S5 sales" that appear to have been driven by them replacing S5 hash power with early production S7s for Hashnest), and figure the 6.7 cent per KWH I used as my incrimental cost for electric, which is pretty bloody cheap in and of itself.




 I haven't seen S7s on DHGate yet, but I'm sure Bitmain will add them to the store shortly if they haven't done so already.

 S7 coupons

 why are you selling them when you got them for free

 Why sell them? Because at least this way I get SOMETHING out of them. I wasn't going to be able to put the $$$$/Bitcoin together to get an S7 before they expired anyway, and I didn't get them "for free" anyway, I got them because I bought a couple of those overpriced "Used S5" units largely BECAUSE I was figuring on getting at least some sort of payback via coupon for the next gen unit per Bitcoin's announcement about coupons.

[Biodom]

There seem to be many smart people in this forum.  Can someone verify my thoughts?

Situation 1:
I would like to confirm this: I have many 750W Platinum PSUs and would like to use 3 750W PSUs (one for each hashboard) to run 1 S7.  I do realize that it would only take a 500W PSU, but I have 750W PSUs.

Situation 2:
Next: there are 3 hashboards at 400W each making the total for ~1210W.  Utilizing VA=W, this would come to 3.6A each hashboard x 3 hashboards = 10.8A for the entire S7.  This would keep it under the 80% utilization of a 15A circuit.  Does this sound correct?

you should be fine with both 1 and 2.

a 15 amp circuit should be able to do 1500 watts 24/7/365

aren't we suppose to derate by 20% or so (to 12A) for 24/7 use.
12A X110v=1320W
12AX120V=1440W
both safely above 1210W, I agree.
I was running one outlet for months at ~1350W with nothing else on the circuit.
It was OK, but i got significant browning of the outlet.

[generalt]

There seem to be many smart people in this forum.  Can someone verify my thoughts?

Situation 1:
I would like to confirm this: I have many 750W Platinum PSUs and would like to use 3 750W PSUs (one for each hashboard) to run 1 S7.  I do realize that it would only take a 500W PSU, but I have 750W PSUs.

Situation 2:
Next: there are 3 hashboards at 400W each making the total for ~1210W.  Utilizing VA=W, this would come to 3.6A each hashboard x 3 hashboards = 10.8A for the entire S7.  This would keep it under the 80% utilization of a 15A circuit.  Does this sound correct?

you should be fine with both 1 and 2.

a 15 amp circuit should be able to do 1500 watts 24/7/365

You just have to remember that a lot of 15A circuits in homes are wired to multiple outlets and/or lights.  Make sure you know which outlets are on the same circuit you use.

[suchmoon]

There seem to be many smart people in this forum.  Can someone verify my thoughts?

Situation 1:
I would like to confirm this: I have many 750W Platinum PSUs and would like to use 3 750W PSUs (one for each hashboard) to run 1 S7.  I do realize that it would only take a 500W PSU, but I have 750W PSUs.

Situation 2:
Next: there are 3 hashboards at 400W each making the total for ~1210W.  Utilizing VA=W, this would come to 3.6A each hashboard x 3 hashboards = 10.8A for the entire S7.  This would keep it under the 80% utilization of a 15A circuit.  Does this sound correct?

you should be fine with both 1 and 2.

a 15 amp circuit should be able to do 1500 watts 24/7/365

aren't we suppose to derate by 20% or so (to 12A) for 24/7 use.
12A X110v=1320W
12AX120V=1440W
both safely above 1210W, I agree.
I was running one outlet for months at ~1350W with nothing else on the circuit.
It was OK, but i got significant browning of the outlet.

I'd replace that outlet and would check the plug if I were you. Something there might be not making proper contact.

80% is very safe ASSUMING all wiring is in top shape, ambient temperatures are reasonable (not always the case with mining), and common sense is used.

[notlist3d]

There seem to be many smart people in this forum.  Can someone verify my thoughts?

Situation 1:
I would like to confirm this: I have many 750W Platinum PSUs and would like to use 3 750W PSUs (one for each hashboard) to run 1 S7.  I do realize that it would only take a 500W PSU, but I have 750W PSUs.

Situation 2:
Next: there are 3 hashboards at 400W each making the total for ~1210W.  Utilizing VA=W, this would come to 3.6A each hashboard x 3 hashboards = 10.8A for the entire S7.  This would keep it under the 80% utilization of a 15A circuit.  Does this sound correct?

you should be fine with both 1 and 2.

a 15 amp circuit should be able to do 1500 watts 24/7/365

You just have to remember that a lot of 15A circuits in homes are wired to multiple outlets and/or lights.  Make sure you know which outlets are on the same circuit you use.

If you had a good electrician they write inside the panel what each breaker goes to.   It will give you a pretty good idea of where it goes.  Lights these days don't take up much power so I would not be to worried about them.

If you don't have inside your electric panel a diagram with what breaker goes where I suggest doing it.  You can easily do it and see what each one turns off.  (Yes you need to be safe and if you don't know about electricity don't do this).  

It may sound dumb but if you are using a surge protector try 2 of them and split load or at least a different one.  I had one that S4 (approx 1400 watts) that surge protector liked to trip.   It was solved by switching surge protectors. 

[torepia]

About the amp's:

As you all are saying, VA=W.

Personally I've been running my 16A circuits close to a 100% load. For about 2 years.

I'm close to my neigbourhoods transformator, so I'm getting about 225-230V.
225-230x16=3600-3680W. I'm going to try to run 3x S7's on each.. I might need to underclock a bit:D

Be aware, if you decide to run above 80%, make sure the wire diameter is correct, and that there are as few sockets as possible in between circuit and power draw, AND that the connections inside the sockets are nice and tight, or this might happen:


This could have gotten a lot worse if we didn't catch the smell. The circuit will not switch off if this scenario happens.


Edit: I wonder tho, is there more loss in power during transfer if the load on the system is higher?

[dog1965]

About the amp's:

As you all are saying, VA=W.

Personally I've been running my 16A circuits close to a 100% load. For about 2 years.

I'm close to my neigbourhoods transformator, so I'm getting about 225-230V.
225-230x16=3600-3680W. I'm going to try to run 3x S7's on each.. I might need to underclock a bit:D

Be aware, if you decide to run above 80%, make sure the wire diameter is correct, and that there are as few sockets as possible in between circuit and power draw, AND that the connections inside the sockets are nice and tight, or this might happen:


This could have gotten a lot worse if we didn't catch the smell. The circuit will not switch off if this scenario happens.


Edit: I wonder tho, is there more loss in power during transfer if the load on the system is higher?

Nope always go by the RMS value its the effective working voltage that's were the 70 percent term comes from if you ever heard of it.

in my case its 120v x 0.7071 = 84.852v not 120v when you say 120v that's the peak voltage not the real effective voltage after its been loaded down also try to run the miners on a sub breaker by themselves.

or power wise just do this 120v x 20amps = 2400w then 0.7071 x 2400w = 1697.04 watts. The 1697.04 watts is the real working effective power not 2400 watts. that's why it burnt up you overloaded it. things burn up when there overloaded.

Just do not exceed 1697.04 watts on one sub breaker.

[alh]

While I don't know where you live, but here in the USA the commonly referred to 120V is the RMS value. I am pretty sure that peak measure on a 120V outlet if checked with a scope will be roughly 170V.

You can confirm this on Google if you wish.

[notlist3d]

Currently selling 2 100 dollar coupons - https://bitcointalk.org/index.php?topic=1171394.0

I have given half of mine away for free, even one that was likely sold after.   So selling these two to go twords my lotto machine build.  They were not really "free" as I paid around 3k for S5+ miner, PSU's, and Shipping.

And they have been sold.   No longer available on coupons.  Will change original post aswell.

[johnyj]

Difficulty just jumped by almost 5%

[philipma1957]

Difficulty just jumped by almost 5%

It will jump big again we are on a 7% at the moment

[dog1965]

While I don't know where you live, but here in the USA the commonly referred to 120V is the RMS value. I am pretty sure that peak measure on a 120V outlet if checked with a scope will be roughly 170V.

You can confirm this on Google if you wish.

I am in the usa and your wrong 120v is the peak not even 120v more 116v if you ever bothered to measure it with a fluke meter. the most you should pull is 1750 watts max to be on the safe side. ask trip-lite or APC customer tech support they will tell you.

most of the stuff on google is hogwash.

lets just say 120v x 20 amps = 2400 watts that's peak power "RMS power is 0.7071 x 2400=1697.04 watts" that's the power you should not exceed especially running it 24/7 !!!!!

also don't forget that your PSU use's power as well that 20 percent must be added back in if the PSU is 80 percent efficient.

You can get away with 1750w but that's max wires are warm but at least they don't burn up.

 

 

[torepia]

Nope always go by the RMS value its the effective working voltage that's were the 70 percent term comes from if you ever heard of it.
in my case its 120v x 0.7071 = 84.852v not 120v when you say 120v that's the peak voltage not the real effective voltage after its been loaded down also try to run the miners on a sub breaker by themselves.
or power wise just do this 120v x 20amps = 2400w then 0.7071 x 2400w = 1697.04 watts. The 1697.04 watts is the real working effective power not 2400 watts. that's why it burnt up you overloaded it. things burn up when there overloaded.

Just do not exceed 1697.04 watts on one sub breaker.

I need to google it! ^^
"In the United States[8] and Canada,[9] national standards specify that the nominal voltage at the source should be 120 V and allow a range of 114 V to 126 V (RMS) (−5% to +5%)"
We're at 230 V +10%/−6% I think, I'm in Norway btw!

Haven't heard about the 70%, but I've heard about the 80% ^^

Edit: I'm measuring 225-233V at the socket, depending on time of day.

dog: would love your input here: https://bitcointalk.org/index.php?topic=1171818.0 , and maybe this thread won't go too off-topic.

[notlist3d]

About the amp's:

As you all are saying, VA=W.

Personally I've been running my 16A circuits close to a 100% load. For about 2 years.

I'm close to my neigbourhoods transformator, so I'm getting about 225-230V.
225-230x16=3600-3680W. I'm going to try to run 3x S7's on each.. I might need to underclock a bit:D

Be aware, if you decide to run above 80%, make sure the wire diameter is correct, and that there are as few sockets as possible in between circuit and power draw, AND that the connections inside the sockets are nice and tight, or this might happen:


This could have gotten a lot worse if we didn't catch the smell. The circuit will not switch off if this scenario happens.


Edit: I wonder tho, is there more loss in power during transfer if the load on the system is higher?

Were the wires secure in the sockets (Most new ones have a little indent wires fit in to make it even tighter)?   Or to long where they touched anything else?

I'm just thinking of my last wiring I did on some I did a few cuts to get to the right size.   If either above were problems could cause bad issues.

[gentacomp]

When S7 release it has more than 12 months BEP (include tax)

 Actually, it's BEP per your stated method of calculation of the S7 at release was a little over 8 months, NOT 1 year.
 I came up with an estimate that it would be 4 BTC before release based on a 250 day BEP, but that was assuming 2 hash boards 2 strings and therefore a little less than half the TH at a little less than half the power at a BTC price when I made the estimate of a hair more than the release date - given the actual figures, it should have been released at more like 8.5 BTC for a 250 day BEP. (Bitmain appears to assume appx. 10 cent / KWH on their version of your BEP calculation).

 I have ZERO CLUE where you are comming up with that "1 year" figure for it, that's not even close given your base assumptions on the calculation unless your electric rate used is quite a bit HIGHER than 10 cents / KWH.

If you calculated with raw number its around $375 usd per THS and its expensive, for start up. But its not fair so I give you the detail, heres my calc :

Setup :
S7 = 1823
PSU = 155
Shipping = 72.45
SUB TOTAL = 2050.45
TAX 25% = 512.6125
TOTAL = 2563.0625 usd

Tax should be 20% but its bullshit since theres smalls charges for whatever

Cost :
Total kwh a month = 1.210 kw x 720h = 871.2
With elec prices 0.1 per kwh = 87.12 usd a month

Income :
Around 300usd (296 last night and 304.2 this morning)

Nett income = 300-87.12 = let say 223 usd a month

So BEP around 2563 divide by 223 usd = 11.49 month

Even all this "good" number is true IF :

*You plug it right now, not next month
*Without diff raising

 (right now estimated diff 7%++ and maybe more than 50% when I get the S7 since they sold to local faster)

I love bitmain, I have good quality services and products since the legend antminer S1. But this price is too high for home miner. But then again, nobody can compete bitmain right now or even in February 2016 too.

[thedreamer]

What's the 25% tax for??

[QuintLeo]

While I don't know where you live, but here in the USA the commonly referred to 120V is the RMS value. I am pretty sure that peak measure on a 120V outlet if checked with a scope will be roughly 170V.

You can confirm this on Google if you wish.

I am in the usa and your wrong 120v is the peak not even 120v more 116v
 

 You are totally incorrect. 117V (nominal) is the RMS value of a common USA electric circuit at the common 15A outlet.

 I HAVE measured them, and looked at them on a scope.

TAX 25% = 512.6125

 That's the discrepancy. Where the HELL is a 25% tax comming from?
 And yes, the "can't plug it in RIGHT NOW" issue is part of the reason I don't believe it can RoI with anything but VERY CHEAP to free electric.

...difficulty...

 Bit under 5% on that last jump to be picky, but close enough to it to matter.
 It WAS running more like 6% estimated jump before the last day though.
 I suspect the current 7% estimate will also prove to be a bit high - but even another 5% would be bad enough.