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

[notlist3d]

Where are you pointing all that hash?

Usually between westhash and f2pool - whichever one is higher payout at the moment.
I've written scripts to manage the miners and change pools according to highest payout.
Sometimes I'll swing them at a PPLNS pool if I think it's due to have a good day, but mostly leave it auto to PPS pools.

How often does westhash win?  It seems like nice/westhash have been below bitcoin payments most of time unless I have missed something.

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[VirosaGITS]

Where are you pointing all that hash?

Usually between westhash and f2pool - whichever one is higher payout at the moment.
I've written scripts to manage the miners and change pools according to highest payout.
Sometimes I'll swing them at a PPLNS pool if I think it's due to have a good day, but mostly leave it auto to PPS pools.

How often does westhash win?  It seems like nice/westhash have been below bitcoin payments most of time unless I have missed something.

It does, but you should probably also see the pool as a PPS pool. Its 4% at the moment, on top of that there is a 2% cut on sell and buy from nicehash. So it seem pretty on par with the 4-10% PPS fee from most pools. Sometimes Nicehash is at -1~2% vs 100% luck mining at that point its "better".

Anyways thats how i threat Nicehash now that i solely have Sha miners.

[elokk]

To everyone running bitmain 1600 psu, bladecenter, etc.....what are you using for surge protection??? I do not have prior experience with these types of psu but switching over and wondering how to do it correctly.

[dmwardjr]

To everyone running bitmain 1600 psu, bladecenter, etc.....what are you using for surge protection??? I do not have prior experience with these types of psu but switching over and wondering how to do it correctly.

If you plan on adding more rigs in the future, a PDU is not a bad choice with surge protection built in.  This will enable you to add more PSU's and rigs as well [Depending on your breaker, the voltage/amperage of the PDU, etc... 

Some have their PDU plugged into a surge protector.  And then some have a PDU plugged into a surge protector that's plugged into another surge protector.  Not many, but a few do this.  As for what surge protectors they are using in front of their PDU's, I'm not sure.  Maybe someone will chime in after a while.

[klondike_bar]

To everyone running bitmain 1600 psu, bladecenter, etc.....what are you using for surge protection??? I do not have prior experience with these types of psu but switching over and wondering how to do it correctly.

If you plan on adding more rigs in the future, a PDU is not a bad choice with surge protection built in.  This will enable you to add more PSU's and rigs as well [Depending on your breaker, the voltage/amperage of the PDU, etc... 

Some have their PDU plugged into a surge protector.  And then some have a PDU plugged into a surge protector that's plugged into another surge protector.  Not many, but a few do this.  As for what surge protectors they are using in front of their PDU's, I'm not sure.  Maybe someone will chime in after a while.

PDU is pretty much pointless if you use a 1600W PSU, since a 208V 15A circuit could only handle 1 PSU, and a 240V 30A circuit will only handle 3-4 PSUs (and thats near the safe limits). most PDUs are built with 10-20 outlets on them and as such offer no real benefit.

better option is to either utilize a basic 208/240V surge protector and try to avoid using costly PDUs

[RichBC]

B6 backside photo https://imgur.com/sIYNhVX

Ok, so, the "30C" resistor is the 20k reference one.
"
and one of the "123" resistor allows you to output 10.6v.
divided by 15 chips in a string = 0.71v at the chips
Edit:
not "123"(12k), but there should be a 1.2k resistor or close value.

1.1k resistor in place of the 1.2k will give 0.77v at the chips
1.3k resistor will give 0.65v at the chips
18k resistor in place of the 20k should also work for 0.64v at the chips
22k resistor in place of the 20k will give 0.77v at the chips

Edit, I'm aging, took me 20 minutes to figure the over/undervolt.

I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider?

I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system.  

Also uncertain about U2 marked AG30, is this an LDO & if so what is it for?

Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board


Rich

[marvykkio]

I do not understand this difference in price between Lot 8 and Lot 9, the only thing that changes is the date of delivery, this is stealing people 

[VirosaGITS]

I do not understand this difference in price between Lot 8 and Lot 9, the only thing that changes is the date of delivery, this is stealing people 

Thats just how it works. The sooner a miner can be delivered, the more it is worth. Its not stealing, thats how it has always been and thats how it always will be. Imagine getting a S7 1 year ago. Now imagine getting a S1 now.

The result speak for itself.

[cryptichermit]

Where are you pointing all that hash?

Usually between westhash and f2pool - whichever one is higher payout at the moment.
I've written scripts to manage the miners and change pools according to highest payout.
Sometimes I'll swing them at a PPLNS pool if I think it's due to have a good day, but mostly leave it auto to PPS pools.

How often does westhash win?  It seems like nice/westhash have been below bitcoin payments most of time unless I have missed something.

There are some times that westhash has significant spikes.  The spikes are not overly frequent.  They seem to occur when new SHA coins are being mined.
Also during difficulty adjustments - like today/yesterday - Westhash seems to hold on to the older rate for several hours as it adjusts down.  My connection to Westhash is better than f2pool as well.
My overall hashrate is generally 2-3% higher on Westhash,  so I factor in these connectivity variants into the script calculations.  Probably mining westhash 30-40%.

[marvykkio]

I do not think is correct, the price difference, should cost the same price of the batch 9, because it is the same hardware, same power, nothing changes, this is only a policy to make more money, and all that we allow ourselves.
cmq I need coupon for batch 8, you have something to sell?

[VirosaGITS]

I do not think is correct, the price difference, should cost the same price of the batch 9, because it is the same hardware, same power, nothing changes, this is only a policy to make more money, and all that we allow ourselves.
cmq I need coupon for batch 8, you have something to sell?

I do not think you understand. Getting a S7 1 month earlier mean you generate 1 BTC in the meantime. So the hardware is worth a bit more.

If you do not understand why the S1 was worth hundreds of dollars a long time ago and is now only worth 40$, then i guess there is not much else i can say to explain it to you.

[J4bberwock]

B6 backside photo https://imgur.com/sIYNhVX

Ok, so, the "30C" resistor is the 20k reference one.
"
and one of the "123" resistor allows you to output 10.6v.
divided by 15 chips in a string = 0.71v at the chips
Edit:
not "123"(12k), but there should be a 1.2k resistor or close value.

1.1k resistor in place of the 1.2k will give 0.77v at the chips
1.3k resistor will give 0.65v at the chips
18k resistor in place of the 20k should also work for 0.64v at the chips
22k resistor in place of the 20k will give 0.77v at the chips

Edit, I'm aging, took me 20 minutes to figure the over/undervolt.

I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider?

I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system.  

Also uncertain about U2 marked AG30, is this an LDO & if so what is it for?

Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board


Rich

Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities
All 3 blades are still working at 800MHz.
All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available

[scyth33]

"bitmain-use-vil=true" in cgminer.conf. any idea what does this do?

[Sweminer777]

B6 backside photo https://imgur.com/sIYNhVX

Ok, so, the "30C" resistor is the 20k reference one.
"
and one of the "123" resistor allows you to output 10.6v.
divided by 15 chips in a string = 0.71v at the chips
Edit:
not "123"(12k), but there should be a 1.2k resistor or close value.

1.1k resistor in place of the 1.2k will give 0.77v at the chips
1.3k resistor will give 0.65v at the chips
18k resistor in place of the 20k should also work for 0.64v at the chips
22k resistor in place of the 20k will give 0.77v at the chips

Edit, I'm aging, took me 20 minutes to figure the over/undervolt.

I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider?

I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system.  

Also uncertain about U2 marked AG30, is this an LDO & if so what is it for?

Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board


Rich

Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities
All 3 blades are still working at 800MHz.
All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available

yo man . areyou trying to verlocko about the capacitieS? would be cool if you could get like 10thz-


Btw i wrote to you , i <m intesreste on a ibm 2800w psu

[RichBC]

B6 backside photo https://imgur.com/sIYNhVX

Ok, so, the "30C" resistor is the 20k reference one.
"
and one of the "123" resistor allows you to output 10.6v.
divided by 15 chips in a string = 0.71v at the chips
Edit:
not "123"(12k), but there should be a 1.2k resistor or close value.

1.1k resistor in place of the 1.2k will give 0.77v at the chips
1.3k resistor will give 0.65v at the chips
18k resistor in place of the 20k should also work for 0.64v at the chips
22k resistor in place of the 20k will give 0.77v at the chips

Edit, I'm aging, took me 20 minutes to figure the over/undervolt.

I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider?

I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system.  

Also uncertain about U2 marked AG30, is this an LDO & if so what is it for?

Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board


Rich

Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities
All 3 blades are still working at 800MHz.
All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available

Hmm that's surprising. 20K & 16K would have the core voltage to approx 0.57V & 0.77V, which should have been noticeable. However the key thing rather then the hashing is did you measure the Volts out from the Converter?

I straightened and tidied the pictures as best I could.



Need to identify what u2 / AG30 is and what it's function is? It may be an LDO but these surface mount idents are always tricky.



U3 is the chip that may be a Digital Pot? If any one can read the ident from one that would be great.  As you can see this is an addition from the V1 Hash board on the Bitmain product page.


Rich

[J4bberwock]

B6 backside photo https://imgur.com/sIYNhVX

Ok, so, the "30C" resistor is the 20k reference one.
"
and one of the "123" resistor allows you to output 10.6v.
divided by 15 chips in a string = 0.71v at the chips
Edit:
not "123"(12k), but there should be a 1.2k resistor or close value.

1.1k resistor in place of the 1.2k will give 0.77v at the chips
1.3k resistor will give 0.65v at the chips
18k resistor in place of the 20k should also work for 0.64v at the chips
22k resistor in place of the 20k will give 0.77v at the chips

Edit, I'm aging, took me 20 minutes to figure the over/undervolt.

I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider?

I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system.  

Also uncertain about U2 marked AG30, is this an LDO & if so what is it for?

Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board


Rich

Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities
All 3 blades are still working at 800MHz.
All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available

Hmm that's surprising. 20K & 16K would have the core voltage to approx 0.57V & 0.77V, which should have been noticeable. However the key thing rather then the hashing is did you measure the Volts out from the Converter?

I straightened and tidied the pictures as best I could.



Need to identify what u2 / AG30 is and what it's function is? It may be an LDO but these surface mount idents are always tricky.



U3 is the chip that may be a Digital Pot? If any one can read the ident from one that would be great.  As you can see this is an addition from the V1 Hash board on the Bitmain product page.


Rich

Here are the pics I took yesterday.
U3 is almost readable.
http://imgur.com/a/YoNul

I'd bet on pic12-1572

http://ww1.microchip.com/downloads/en/DeviceDoc/40001723D.pdf

[RichBC]

Here are the pics I took yesterday.
U3 is almost readable.
http://imgur.com/a/YoNul

I'd bet on pic12-1572

http://ww1.microchip.com/downloads/en/DeviceDoc/40001723D.pdf

Yes good spot, you nailed it...



So we have us a Microcontroller, it must be to do with the voltage control. Just need to work out how it's connected and how they are using it?

Rich

[RichBC]

B6 backside photo https://imgur.com/sIYNhVX

Ok, so, the "30C" resistor is the 20k reference one.
"
and one of the "123" resistor allows you to output 10.6v.
divided by 15 chips in a string = 0.71v at the chips
Edit:
not "123"(12k), but there should be a 1.2k resistor or close value.

1.1k resistor in place of the 1.2k will give 0.77v at the chips
1.3k resistor will give 0.65v at the chips
18k resistor in place of the 20k should also work for 0.64v at the chips
22k resistor in place of the 20k will give 0.77v at the chips

Edit, I'm aging, took me 20 minutes to figure the over/undervolt.

I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider?

I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system.  

Also uncertain about U2 marked AG30, is this an LDO & if so what is it for?

Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board


Rich

Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities
All 3 blades are still working at 800MHz.
All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available

I have not fully sussed it but am making progress with the better picture. R15, 20K is not the Reference resistor it's part of the compensation network to pin 3 of the Buck with C73 & C75. The reference resistor (fb1) is R9, 82K taking the voltage from the Converter output.The resistor to ground (fb2) is R10, 6K8.

However this is where it get's interesting and I have not fully worked it out. In parallel with R10 to Ground is a series combination of R17, 12K and U2.

Which of course begs the question as to exactly what U2 (AG30 on one board AG6K on the other) My guess is that it's a single channel Digital pot controlled over I2C by the PIC, but more work needed to confirm this.

Rich

[J4bberwock]

B6 backside photo https://imgur.com/sIYNhVX

Ok, so, the "30C" resistor is the 20k reference one.
"
and one of the "123" resistor allows you to output 10.6v.
divided by 15 chips in a string = 0.71v at the chips
Edit:
not "123"(12k), but there should be a 1.2k resistor or close value.

1.1k resistor in place of the 1.2k will give 0.77v at the chips
1.3k resistor will give 0.65v at the chips
18k resistor in place of the 20k should also work for 0.64v at the chips
22k resistor in place of the 20k will give 0.77v at the chips

Edit, I'm aging, took me 20 minutes to figure the over/undervolt.

I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider?

I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system.  

Also uncertain about U2 marked AG30, is this an LDO & if so what is it for?

Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board


Rich

Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities
All 3 blades are still working at 800MHz.
All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available

I have not fully sussed it but am making progress with the better picture. R15, 20K is not the Reference resistor it's part of the compensation network to pin 3 of the Buck with C73 & C75. The reference resistor (fb1) is R9, 82K taking the voltage from the Converter output.The resistor to ground (fb2) is R10, 6K8.

However this is where it get's interesting and I have not fully worked it out. In parallel with R10 to Ground is a series combination of R17, 12K and U2.

Which of course begs the question as to exactly what U2 (AG30 on one board AG6K on the other) My guess is that it's a single channel Digital pot controlled over I2C by the PIC, but more work needed to confirm this.

Rich

ok, so R15 = Rc1 in the datasheet, and C73, C75 would be Cc1,Cc2.


U2 should be a digital pot made by onsemi, then. In the cat51xx family

And that means that we could have some software control over it.

I spotted the 6k8 as being tied to ground.
I'll do a quick test on one board replacing the 6k8.

I noticed that without the controller plugged, the voltage output at the coil was closer to 8v, can't remember exact value.
And, it went higher to 10.2 with the control board plugged

[not.you]

"bitmain-use-vil=true" in cgminer.conf. any idea what does this do?

did you make that up?

bitmain-us-evil=true