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

[philipma1957]

Maybe they start to ship s-7's from batches 2 & 3

Quick question  on batch 1 does anyone not have their order shipped?

[Biodom]

I do not think reward halving will have impact on S7 price. Tooo much time until that...

I would have to agree with you on that one to an extent.  That's the only thing I could come up with for the price reduction between batch 1 and batch 3.

I think the key is it will not yet.  But once we hit say 6 month's, then 3 months etc no doubt it will effect it.   With less reward people would not spend as much.

But we really don't know a lot of what will happen at halving we need to know to determine miners price.  BTC price at halving will affect miners price greatly, and no one can tell us what that will be currently..

Agreed, we don't know what will occur with difficulty and btc price.  

I plan on buying more every month.  I'm not saying how many each month but it will be quite a bit.  I plan on buying ten of their 1600 PSU's as well.  The way my PDU's are set up, I still have more watts available on each PSU for more S7's.  I would rather do this with BITMAIN's PSU's than use an IBM 2880W PSU to power only one S7 when it can easily power two.  It would be a waste to do this with an IBM 2880W.  Hence, the need for BITMAIN's 1600W PSU.

I've been up all night.  It is 5:39am at my location now.  It's past time to get some sleep.

Good night everyone!

I must be missing something, so power 2 with an IBM 2880W PSU if that is what you can do, heck power 5 per 2 IBM 2880W PSUs.  You have lower cost, and better efficiency than Bitmain PSUs, I am not understanding the logic since you make the point you can power two per PSU.

I wanted to ask who sells them, but then figured it out  
Quick question: for IBM 2880W PSU, 8 PCIe cords with 8 extenders-how many connectors total: 8, 16 or a different number. Will it work on 208V instead of 240?

[Biodom]

Maybe they start to ship s-7's from batches 2 & 3

Quick question  on batch 1 does anyone not have their order shipped?

i sneaked in another batch 2 order yesterday on a btc spike; was deciding whether to order batch 2 or 3 and went with batch 2 this time based on intuition (I could be wrong there).
my prior b2 order has not been shipped yet.

[padrino]

I do not think reward halving will have impact on S7 price. Tooo much time until that...

I would have to agree with you on that one to an extent.  That's the only thing I could come up with for the price reduction between batch 1 and batch 3.

I think the key is it will not yet.  But once we hit say 6 month's, then 3 months etc no doubt it will effect it.   With less reward people would not spend as much.

But we really don't know a lot of what will happen at halving we need to know to determine miners price.  BTC price at halving will affect miners price greatly, and no one can tell us what that will be currently..

Agreed, we don't know what will occur with difficulty and btc price.  

I plan on buying more every month.  I'm not saying how many each month but it will be quite a bit.  I plan on buying ten of their 1600 PSU's as well.  The way my PDU's are set up, I still have more watts available on each PSU for more S7's.  I would rather do this with BITMAIN's PSU's than use an IBM 2880W PSU to power only one S7 when it can easily power two.  It would be a waste to do this with an IBM 2880W.  Hence, the need for BITMAIN's 1600W PSU.

I've been up all night.  It is 5:39am at my location now.  It's past time to get some sleep.

Good night everyone!

I must be missing something, so power 2 with an IBM 2880W PSU if that is what you can do, heck power 5 per 2 IBM 2880W PSUs.  You have lower cost, and better efficiency than Bitmain PSUs, I am not understanding the logic since you make the point you can power two per PSU.

I wanted to ask who sells them, but then figured it out  
Quick question: for IBM 2880W PSU, 8 PCIe cords with 8 extenders-how many connectors total: 8, 16 or a different number. Will it work on 208V instead of 240?

Boards have 22 connectors built in, if you found my offering that is a base, most people but 17-22 PCIe cables per kit.

[hawkfish007]

It appears that my Sep 29 B3 order has been shipped per UPS 😀

[philipma1957]

It appears that my Sep 29 B3 order has been shipped per UPS 😀

Very good to hear this, anyone else?

[Biodom]

It appears that my Sep 29 B3 order has been shipped per UPS 😀

they are hopefully going by the dates ordered/paid, not by the batch #

[tl121]

These Batch 2 and 3 miners probably won't get shipped until,

* Price of BTC goes to $300-$315 and reverses back down. I think they are holding them right now and mining with them so they can dump.

*Or will ship them on November 5th as its the last delay day.


Mining is very profitable at the moment.

yeah while it is a bit annoying.  I do have 2 mining as I type.  both work fine.

I finally got my Batch 1 units, two of them. One does 4.88 avg while the other 4.63-4.68. Are a lot of people seeing this?

I paid the full price of batch 1 and pretty pissed I got a batch 2 unit, guessing by the hash rate. I tried to OC it to 618 and 625, but not much difference, a lot more HW errors with minimal hash gain.

Try to troubleshoot it by doing 593
Once it fires up at 593 look at hw error rate.

If error rate is .1 or higher do a system reboot.
If error rate comes back at .0100 or lower wait for hash rate to settle you should get about 4775.

With lower power then you do by going to 612

Sometimes the error rate can stay high after a system reboot.  (Sometimes even after several system reboots.)  In that case, I've found it useful to power cycle.  Let the machine run for a few minutes and then system reboot.  This seems to get things back to a low hw error rate with my unit.  Then I can increase the clock rate, hopefully this time to a value that won't screw things up.  Presently my early batch 1 unit is averaging 4.87 TH,  618M, 57c, fan 3000 rpm, 1d21h.  I plan to leave it alone unless something changes for some reason or other, such as a power interruption.

[FlensGold]

My order (B3) from September 30th has also been shipped today

[tl121]

It appears that my Sep 29 B3 order has been shipped per UPS 😀

Very good to hear this, anyone else?

Yes.  Mine too via UPS web site.  Also, Bitmain is showing it as shipped with the same tracking number. (No emails received from either Bitmain or UPS, just postings on their web sites.)

[suchmoon]

Rumor has it that orders placed as late as October 10 have been shipped.

I think it went out of stock around that time so chances are that all Batch 2/3 miners might be on their way. Check your order history.

[MaximeAD]

My order (B3) from September 30th has also been shipped today

My case:

B2, ordered septembre 30th, paid October 1st via Wire. Not shipped

But it should be soon!

[Biodom]

Sometimes the error rate can stay high after a system reboot.  (Sometimes even after several system reboots.)  In that case, I've found it useful to power cycle.  Let the machine run for a few minutes and then system reboot.  This seems to get things back to a low hw error rate with my unit.  Then I can increase the clock rate, hopefully this time to a value that won't screw things up.  Presently my early batch 1 unit is averaging 4.87 TH,  618M, 57c, fan 3000 rpm, 1d21h.  I plan to leave it alone unless something changes for some reason or other, such as a power interruption.

If I was to give a suggestion to bitmain engineers it would be to force a higher initial fan speed on reboot, like SP20 was doing.
The way it is currently setup, upon reboot there is an abrupt change from high speed fan to initially low speed, which I think is causing temporary chip overheating. Board sensors are not highly relevant here because sensors are probably removed from chips. I think that this putative chip overheating might be causing the initial higher error rate upon reboot. Once fan reaches high speeds, the system equilibrates and errors decrease.

[dmwardjr]

I do not think reward halving will have impact on S7 price. Tooo much time until that...

I would have to agree with you on that one to an extent.  That's the only thing I could come up with for the price reduction between batch 1 and batch 3.

I think the key is it will not yet.  But once we hit say 6 month's, then 3 months etc no doubt it will effect it.   With less reward people would not spend as much.

But we really don't know a lot of what will happen at halving we need to know to determine miners price.  BTC price at halving will affect miners price greatly, and no one can tell us what that will be currently..

Agreed, we don't know what will occur with difficulty and btc price.  

I plan on buying more every month.  I'm not saying how many each month but it will be quite a bit.  I plan on buying ten of their 1600 PSU's as well.  The way my PDU's are set up, I still have more watts available on each PSU for more S7's.  I would rather do this with BITMAIN's PSU's than use an IBM 2880W PSU to power only one S7 when it can easily power two.  It would be a waste to do this with an IBM 2880W.  Hence, the need for BITMAIN's 1600W PSU.

I've been up all night.  It is 5:39am at my location now.  It's past time to get some sleep.

Good night everyone!

I must be missing something, so power 2 with an IBM 2880W PSU if that is what you can do, heck power 5 per 2 IBM 2880W PSUs.  You have lower cost, and better efficiency than Bitmain PSUs, I am not understanding the logic since you make the point you can power two per PSU.

Sounds like I'm about to learn something...

You mean to tell me I can run more than two S7's with an IBM 2880W PSU  I assumed it can do about 3200 to 3300 watts max.  So, I can actually power 5 of them safely?

[philipma1957]

he said 2 of them can do 5 s-7's


so if each s-7 pulls 1200 watts    5 x 1200 = 6000 so the psu needs to do 3000 watts.

I would be willing to guess based on my testing 5 s-7's set at  freq 587  would do under 5760 watts psu needs to do 2800 watts

so yeah I think you could do 5 at freq 587 or less.

the savings in psu's  on 50 s-7's would be  50 x amtminer psu vs 20 x 2880 psu

even if you got say 4840 on all the antminer psu driven s-7s'

and only 4740 on all the 2880 watts psus.

the savings in psu cost would make up for it.

[dmwardjr]

he said 2 of them can do 5 s-7's


so if each s-7 pulls 1200 watts    5 x 1200 = 6000 so the psu needs to do 3000 watts.

I would be willing to guess based on my testing 5 s-7's set at  freq 587  would do under 5760 watts psu needs to do 2800 watts

so yeah I think you could do 5 at freq 587 or less.

the savings in psu's  on 50 s-7's would be  50 x amtminer psu vs 20 x 2880 psu

even if you got say 4840 on all the antminer psu driven s-7s'

and only 4740 on all the 2880 watts psus.

the savings in psu cost would make up for it.

Thanks for clarifying that he said 2 x IBM 2880's and not just one (1).

Here was my dilemma:  My 240V/30A PDU's have two (2) 15 amp breakers built into it.  The maximum amount of amps I've been able to go on one of the 15 amp legs of the PDU is 17 amps without the 15 amp breaker on the PDU tripping.

After thinking about it... I still cannot do 3 x 2880W PSU's on the 30 amp PDU's.  2 x 2880W PSU's would have to be plugged into one of the 15 amp legs of the PDU.  Which means one of the 15 amp breakers built into the PDU would trip all the time and would not be able to power the 3rd 2880W PSU.  See my dilemma?

This is why I was mentioning buying the BM1600W PSU's to go along with IBM 2880W PSU's while being connected to 2 x 15 amp legs with breakers built into the PDU.  Now I'm wishing I had 40 amp or 50 amp PDU's.

Here are the PDU's I have:  http://www.tripplite.com/metered-pdu-30a-208v-240v-0u-vertical-c19-c13-outlets-nema-l6-30p-single-phase~PDUMV30HV/

[AriesIV10]

My order (B3) from September 30th has also been shipped today

2 orders shipped from 9/29 and 10/03.  Both Batch 3.  

[Finksy]

2.5 S7's on each 2880W PSU would be pulling 2,825W, or 11.77 amps. The problem is you can't divide 5 S7's (15 hashboards) evenly, so one PSU would have to take on ~3,013W (12.55A @ 240V), and the other ~2,636W (10.98A @ 240V). If you want to power 5 S7's I would suggest running a single hashboard from one of the S7's on a separate PSU (should draw ~377W DC), leaving you with 7 hashboards + controller for each 2880W PSU's loaded @ 91-92%.  Better for longevity and efficiency, and almost all of us have small PSU's kicking around somewhere.

Plus, since the 2880W boards have 22 PCIe connectors, it's enough to power all 3 PCIe ports on all 7 hashboards + the controller.

[dmwardjr]

2.5 S7's on each 2880W PSU would be pulling 2,825W, or 11.77 amps. The problem is you can't divide 5 S7's (15 hashboards) evenly, so one PSU would have to take on ~3,013W (12.55A @ 240V), and the other ~2,636W (10.98A @ 240V). If you want to power 5 S7's I would suggest running a single hashboard from one of the S7's on a separate PSU (should draw ~377W DC), leaving you with 7 hashboards + controller for each 2880W PSU's loaded @ 91-92%.  Better for longevity and efficiency, and almost all of us have small PSU's kicking around somewhere.

Plus, since the 2880W boards have 22 PCIe connectors, it's enough to power all 3 PCIe ports on all 7 hashboards + the controller.

Thanks for the additional brain storming for me, Finksy.  I do have 9 x Corsair AX860 PSU's along with the 20 x IBM 2880W PSU's.  I don't need all 20 x 2880's yet.  That will not begin until December.  So, I believe I will plug in 1 x 2880W and 1 x AX860W PSU in each of the 15 amp legs of my 30 amp PDU's to be able to power 5 or 6 x S7's.

EDIT:  So, I believe I will keep it to 5 x S7's at 600 MHz stock frequency per PDU instead of 6 x S7's under clocked at 575 MHz.  That would be configured the following way for each 15 amp leg of the 30 amp PDU:  1 x 2880W PSU powering 2 controllers (20 watts) and 7 blades (2800 watts) and an AX860 watt PSU powering 1 controller (10 watts) and 1 blade (400 watts) on one of the 15 amp legs of the 30 amp PDU for a total of 3230 watts (13.46 amps).  Then have 1 x 2880W PSU powering 2 controllers (20 watts) and 7 blades (2800 watts) for a total of 2820 watts (11.75 amps) on the other 15 amp leg of the 30 amp PDU.

Thanks again for the brain storming.

EDIT:  I know the blades are actually 377 watts each instead of the 400 watts I stated when rounding off and the controller is probably a bit more than the 10 watts I stated.  Anyone have any idea about how many watts the controller is?

[edonkey]

Finksy, I've got 2 2880 PSUs powering 3 S7s. Originally I thought I would put one complete S7 on each PSU, then split the third one across the PSUs.

In the end I put one S7 one one PSU and 2 S7s on the other. I figured that two S7s on a single 2880 PSU only take up 80%, so that seemed reasonable. Also this configuration is simpler to keep track of in case I ever need to power cycle the PSUs from the PDUs (this is all deployed at a data center).

Of course one PSU is underburdened, but them's the breaks. I don't have enough physical space to add another S7.

Another potential drawback is that the 2 new S7s that are on a single PSU are both very strong performers. They are candidates for overclocking, but then they're eating into that 20% headroom.

Does the above configuration make sense to you, or are there tangible benefits to splitting the third S7 across the two PSUs?