Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 327. (Read 527809 times)

I would suggest waiting since Bitmain has still not shipped some of the orders from early September yet.  You don't want to have Bitmain sitting around 1-2months before they ship your miner.  This is just lost time and mining earnings for you.

one would think that a simple program can take care of this, no personnel presence needed.

This post is a very good indicator:

https://bitcointalksearch.org/topic/m.12616869

when do they come back from holiday ? I want to buy 2x S7 from them

Because chinese are in holiday.

why does the BTC price on bitmaintech.com is so off ? it's rated at 236.52 USD while price got up to 244.75 $ right now on btc-e.com
I wanted to buy 2x s7 but the price is way lower than reality.what is going on ?

I guess i'll have to further my theory where its simply the volt control not being equal. It would be interesting to see whats the core voltage on the S7 of various performance.

If it has poor volt control, this would result in not having a proper amount of current fed to the chip, it would explain why some miners show more HWE% and much less hashrate even if it is not proportional.

This seem like the same thing/issue with when you try to clock a S5 to 400hz+, the hashrate drop even though the HWE% does not go up by that much.

If you could raise the voltage of those S7 by a bit, the problem would probably go away, though maybe at worse efficiency.

This is what I asked for when they put S7 4.66 th / s,
a person orders s7 4.86, 4.66 and they send, for me this is a strategy that will backfire on us.

So a strong correlation between the Hash Rate & the Error Rate, but seems to be having a greater effect on the Hash than I would expect? I guess No 1 does not like the cold.  Would be instructive to drop the Frequency to 575MHz and see what that does to the Hash & Error Rate.

Rich

Here are my stats.  I will test each card individually this weekend on #3, #4 and #1.  I have reset each of this with a soft-reboot and hardboot.

#    Ave gh/s  Freq      Temp       HW         Elapsed
2       4744     600    54,54,56   0.0011%    7D
5       4738     600    52,52,55   0.0235%   10D
3       4513     600    53,54,55   0.0384%    7D
4       4480     600    54,53,55   0.0985%    6D
1       4276     600    49,46,44   0.1174%    12hrs (this one is upstairs and has a/c)

They take a ~ week off.

Bitmain says shipments for other stuff will resume October 8 but no word on S7 Batch 1 of course  


Edited 2020-11-28 to fix a broken image

When does the current holiday end?

this says the third

Thankfully i am not too worried, i always suspect such "conspiracy" to be the case. I'm just annoyed that they're selling the S7 for so much and people defending its value. I think at this pace, some home miner will be in for a pretty bad return on their investment with the halving.

Bitmain already said their next stuff would be 16NM so its likely they already have a progress toward this. They might be waiting for a higher production capacity however, since producing chip toward the technological limit is always low yield.

Don't worry, I'm sure bitmain has 0.06 and 0.15 chips too. We'll get those in a few months when they're done selling their old S7s.

That is very annoying. Are you sure you are giving the Miner long enough for the Hash rate to stabilise?

If you do get to measure each of the 15 Hash boards separately please post up the results as it will be interesting to see the variance in boards.

Rich

well  maybe it is not so bad.

4744
4738


4513 ------- check your error rates
4480 -------   "       "       "      "
4276 -------   "       "       "      "

 First do  a soft reboot on the 3 shitty ones. See my thread on this

https://bitcointalksearch.org/topic/my-bitmaintech-s-7-underpreforms-at-freq-600-freq-550-not-freq-500-fixed-1196671

if they are still bad then swap cards.

I am getting a little depressed.  I received 5 miners so far and running all of them at the standard freq of 600.  My ave gh/s for these are 4744, 4738, 4513, 4480 and 4276.  They are having me do some troubleshooting by changing out power supplies (I have all Platinum) and then test each card individually.  I ordered 4860gh/s machines!  Very frustrating!!!  

I'm fairly certain if the price raise by that much, there will just be more massive data center that get onlined and profitability will more or less be back to the same with the difficulty increase.

After all, the profitability is decided by what the majority pay, not what we pay, so we're pretty much just being dragged along, whether you have 50A capacity or 200A capacity.
For a home, you may have access to 90A 240V which is much better than my conservative 70A at 120V vs a max of 125A for my complete apartment.

The difference between now's hardware and then's hardware (2012) is even if now it cost 2x more, it should be profitable for longer.

But our real only advantage is as you say, we make use of the heat if we needed it either way. But there is a limit to that as its not like we need 10kW heating 24/7.

So Home miners have it very hard right now, and very cheap electricity cost is needed. Like access to Hydro electricity or such. That way you can rush and buy all the S5 when the mass of home miner rush to the S7. As we expected many S5 has fallen down for sale with the S7's coming.

This is a debate I have had in my mind more then one time. I have been home mining since 2012. Difficulty was once 25% per jump for an entire year. It is now around 2.5% for the last year.

The true home miner  has 1 thing going for him that the farms don't the ability to use the heat. So for 7 months a year my mining cost drops as I use the free heat.
The biggest thing against a home miner is most homes are 200 amps  which caps you at 100amps or so for mining even if you do three 30 amp 240 circuits

You have 90 x 240 x .80 watts or 17 kwatts.   so this would be 15 s-7's as  a max  that is 72 th

 72 th earns .59btc a day

when I was doing gpus and was using 6-7 kwatts  back in 2012 I was earning 1 btc a day

So in btc power cost we are losing.

17 kwatts gets .59btc  2015  using gear that spends .25  watts a gh

7 kwatts gets 1 btc      2012 using gear that spends  300 watts a gh

so with gear that is 1200 x better   1 btc costs  28.8 times the power

price factors into this  

2012 price 10 bucks
2015 price 240 bucks

the is 24 x     but power is 28.8 x

so The cost to get a coin is worse.

more on this as the  price for gear in 2012 was  22 x 350 =7k gpus  and 3k in pc parts or 10k
15 s-7's cost = 15 x 1650 or 24750

so 2012 = 10k
2015 = 24.750k  make it 25k

so gear is 2.5x the price

All this is killing home mining and all mining.

once you factor all this in it is 3x more costly to get  a coin in 2015 then in 2012.  Not good at all  or is btc undervalued and should be 720 usd not 240 usd?