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

[RichBC]

i dont touch that board, i dont see in my hands, i dont measure that, my posts for this subject are only guesswork ofcourse.
but engineer guesswork. if i made this board i use max813 not this one. this is bullshit compansate safety circuit.

Edit:
also dont forget the S7's boot-idle-working voltages are different. this closed loop circuit work for these too.

OK good... I have a strong respect for "Engineer guesswork" I do it all the time... However when trying to understand a circuit I think it is important to differentiate between an educated guess and an actual check or measurement that has been made.

It's all to easy to make a mistake, for instance I agree and stated that it was likely that R21 & R22 are pull ups on the Data & Clock lines to 3.3V however when someone states that an unmarked resistor is 4.7K then I assume they have measured it as there is no "standard" pull up value for I2C.

We will have to wait for someone to makes some actual checks and measurements to establish if the function of the PIC & Digital Pot goes beyond a Factory setting of the Core voltage...



Rich

[Cyper_BLC]

i dont touch that board, i dont see in my hands, i dont measure that, my posts for this subject are only guesswork ofcourse.
but engineer guesswork. if i made this board i use max813 not this one. this is bullshit compansate safety circuit.

Edit:
also dont forget the S7's boot-idle-working voltages are different. this closed loop circuit work for these too.

OK good... I have a strong respect for "Engineer guesswork" I do it all the time... However when trying to understand a circuit I think it is important to differentiate between an educated guess and an actual check or measurement that has been made.

It's all to easy to make a mistake, for instance I agree and stated that it was likely that R21 & R22 are pull ups on the Data & Clock lines to 3.3V however when someone states that an unmarked resistor is 4.7K then I assume they have measured it as there is no "standard" pull up value for I2C.

We will have to wait for someone to makes some actual checks and measurements to establish if the function of the PIC & Digital Pot goes beyond a Factory setting of the Core voltage...



Rich

thanks, i can write a program for this pic and we can use a voltage adjuster but more reason to dont do that:
-i havent got b8
-safety first
-it can be adjust external, however i can make a plugin to beagle bone black with unused pins.

[RichBC]

thanks, i can write a program for this pic and we can use a voltage adjuster but more reason to dont do that:
-i havent got b8
-safety first
-it can be adjust external, however i can make an plugin to beagle bone black with unused pins.

Agreed all sorts of changes and additions are possible, but first it's important to understand the original function of the circuit. Unfortunately with just the pictures I have got to the limit of the guesswork I can do so let's see what J4bberwock comes up with?

Rich

[Prelude]

It's fascinating watching you guys discus all of this. I wish I could contribute, but it's a good country mile above my head. Here's hoping a way to adjust voltage is found, since B8 definitely doesn't respond to increased 12V from the PSU as earlier batches do.

[RichBC]

It's fascinating watching you guys discus all of this. I wish I could contribute, but it's a good country mile above my head. Here's hoping a way to adjust voltage is found, since B8 definitely doesn't respond to increased 12V from the PSU as earlier batches do.

I am certain that there will be a way to adjust the voltage.  What is definitely known is that we have a Buck Converter supplying the voltage to the ASIC chain, that Converter has a Digital Pot which adjusts the value of the resistor from the FB input to ground (If you like a variable Digital Pencil Mod  controlled by a Micocontroller.

What is not known, at the moment, is exactly how this addition is being used by Bitmain. At one extreme it is just a Factory set fixed voltage used to make the best of the different batches of BM1385 at a given default frequency. At the other end of the scale the Microcontroller has connection to the System Controller and it's just waiting for a release of firmware to add adjustable voltage. Off at an angle from the extremes  we have  Cyper_BLC theory that it is a second layer of closed loop, safety based voltage control.

The reason B8 is not responding to a change in it's supply voltage is because as fast as you are winding the volts up the Buck Converter is winding them back down again  just like an S1 or S3.


Dearly wish that it was not so expensive to get an Batch 8 S7 to the UK as I feel that in the long run, after the halving when efficiency improvements become the name of the game, it will be the Batch to have.

Rich

[klondike_bar]

^I still suggest you try modifying the setting in cgminer.conf.factory and then hard-reset the device with the physical push-button. If that command can adjust the voltage, a reset might "force" the change and would possibly make a lot of sense depending how the chips are programmed initially for factory specs

[Rabinovitch]

My S7 are getting lots of HW errors and are underperforming
I have 4 of them ,only 1 is getting low HW errors and good performance

The rest of them perform like this one : https://gyazo.com/af319f55fa78b0ed11626611e76888b0
with HW errors around 0.03 % or higher

How can I fix this ?

Why do you think that 0.03% is too much? If you remember, previous generations of Bitmain ASIC miners (S2 for example) had way more HW errors, my S2 ran at 0.9%. But at the pool there was about 1+ Th. So did I lose any valuable amount of hashing power? I guess no.

Also I found that my S7 (Batch6) gives many HW errors right after start, it can be up to 3% in first seconds (I saw it once), but take a look at the HWE percentage after 20-30 minutes...

[thedreamer]

My S7 are getting lots of HW errors and are underperforming
I have 4 of them ,only 1 is getting low HW errors and good performance

The rest of them perform like this one : https://gyazo.com/af319f55fa78b0ed11626611e76888b0
with HW errors around 0.03 % or higher

How can I fix this ?

Why do you think that 0.03% is too much? If you remember, previous generations of Bitmain ASIC miners (S2 for example) had way more HW errors, my S2 ran at 0.9%. But at the pool there was about 1+ Th. So did I lose any valuable amount of hashing power? I guess no.

Also I found that my S7 (Batch6) gives many HW errors right after start, it can be up to 3% in first seconds (I saw it once), but take a look at the HWE percentage after 20-30 minutes...

Because at original freq or under it is 0.0000% HW error rate. Once you go into higher speeds (although the later batches get it even at original speeds from what I see)you start hitting HW error rates. If there is more than 0.01%, IMO your miner is more irrational than stable and could impact the miner hardware or the income generated from it towards the pool.

On new gen hardware there should be pretty much no HW errors and comparing it to an old miner tech that is 3 generations or more previous is like saying that your 1990 Nissan Sentra sounded like a lawnmower and it is ok for a brand new 2015 model to have the same shitty sound. 

[surfariver]

My S7 arrived on Black Friday (USA delivery).  A few weeks later I got a bill from Fedex for a Customs Duty of 2.6%.  I was under the impression all of the taxes and duties I've seen mentioned in this forum were for people receiving these outside of the US.  Is this legit?  Go ahead and pay the $50?

Thanks!

[fr4nkthetank]

My S7 arrived on Black Friday (USA delivery).  A few weeks later I got a bill from Fedex for a Customs Duty of 2.6%.  I was under the impression all of the taxes and duties I've seen mentioned in this forum were for people receiving these outside of the US.  Is this legit?  Go ahead and pay the $50?

Thanks!

hmm well they messed up if they send a bill AFTER giving you the miner....I say forget the bill until they really start bothering you to pay.  You will probably get some automated phone call in a while.

[hawkfish007]

My S7 arrived on Black Friday (USA delivery).  A few weeks later I got a bill from Fedex for a Customs Duty of 2.6%.  I was under the impression all of the taxes and duties I've seen mentioned in this forum were for people receiving these outside of the US.  Is this legit?  Go ahead and pay the $50?

Thanks!

That's probably a onetime brokerage fee charged by the carriers. I had to pay $37 to UPS once (S3 era),  ever since I stuck with UPS for shipment from Bitmain and didn't have to pay anymore fees.

[notlist3d]

My S7 arrived on Black Friday (USA delivery).  A few weeks later I got a bill from Fedex for a Customs Duty of 2.6%.  I was under the impression all of the taxes and duties I've seen mentioned in this forum were for people receiving these outside of the US.  Is this legit?  Go ahead and pay the $50?

Thanks!

That's probably a onetime brokerage fee charged by the carriers. I had to pay $37 to UPS once (S3 era),  ever since I stuck with UPS for shipment from Bitmain and didn't have to pay anymore fees.

Does it say it is customs duty?  Only time I have gotten a charge in US was when bitmain shipped a PSU at a different weight then actual.  They weighed it and sent me a bill for difference.

If not I would call them and also more why you owe it.   I have not had to do a custom's payment in US.  But maybe I'm lucky.

[surfariver]

yes, "custom's duty" for most of it and then $7 for an advancement fee which I'm assuming is for Fedex paying it for me

[Micky25]

Hi guys,

would someone of you be so kind to give a hint, which firmware fits to which batch?

Thanks and best regards,
Micky25

[RichBC]

Top 3 were the first release of firmware on the website for the 162 Chip Systems. The 550MHz people were informed that they were getting a slower default frequency, it was not what they ordered.

Bottom 6 were the second release for the 162 Chip Systems and the first to the 135 Chip Systems.

Unfortunately nothing has been said about any changes in the firmware relative to the original release....


Rich

[Micky25]

^Thank you! 

[ATCkit]

Anyone got Batch 1,3 5 or 6 hashing boards they'd like to sell? I'm looking for 3 working boards.

PM me with cost per board if you're interested.

[bittalc1]

My miners arrived, and got stuck at the customs . They are asking for the invoice (proof of payment) but i still havent heard from Bitmain. I opened a ticket on Friday. I called in USA support, talked about 10min and no help from that guy!!! What should i do guys?

[dmwardjr]

My miners arrived, and got stuck at the customs . They are asking for the invoice (proof of payment) but i still havent heard from Bitmain. I opened a ticket on Friday. I called in USA support, talked about 10min and no help from that guy!!! What should i do guys?

You should have received an email with proof of payment that shows bitcoin converted into USD shortly after you purchased them.  Simply print it and show it to them.

EDIT:  I have noticed my most recent invoice from BITMAIN only shows BTC for payment and no USD conversion.  Maybe the BTC will be sufficient.

[bittalc1]

My miners arrived, and got stuck at the customs . They are asking for the invoice (proof of payment) but i still havent heard from Bitmain. I opened a ticket on Friday. I called in USA support, talked about 10min and no help from that guy!!! What should i do guys?

You should have received an email with proof of payment that shows bitcoin converted into USD shortly after you purchased them.  Simply print it and show it to them.

EDIT:  I have noticed my most recent invoice from BITMAIN only shows BTC for payment and no USD conversion.  Maybe the BTC will be sufficient.

I cant give them the BTC invoice, they need the dollar invoice. Fuuuu im screwed