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

[Biodom]

Oh, well, even early B1 pulls just 1280-1290 at the wall with EVGA 1300 (at 120V), hashing at above B8 (4.83Th).
B5 does even better and B7 does 1345W at the wall with the same EVGA, which is not even a plat PSU, for 5.1 TH
oldies, but goodies, relatively speaking.

I am just saying...it went a bit downhill if you think about it...

It certainly did. Bitmain figured they'd squeeze the last drops out of the S7s by removing chips and applying a factory overclock to them to give us approximately the same speed. That brings efficiency and reliability down. I'm a victim of the lower reliability, and it seems I'm not alone. B8 seems to have a higher failure rate so far.

At 700MHz they're pretty much tapped out, and overclocking is not an option until we figure out how to control voltage. My OG S7s run at 6TH/s in comparison with overclocking.

yeah, but you lost me there a bit. What's OG? Original Gangsta? Overwhelmingly Good?

[yslyung]

Went ahead and bought some more S7s Batch 8.  These are my first Batch 8.  I am hoping these will be good for the long run!

i received 2 b8 yesterday & each of them messed up.

1 dead board 0 temps with lovely dashes, nothing could revive them. shows 30 instead of 45 chips. if test with single board it shows 0 temp & 48 magical chips but do not hash.

the other had a almost dead board with low hashrate, high hw error, low temp (5 or more C) lower than other 2 boards. once i disconnected the problematic board the other 2 works perfectly no issues.

i sent 1 board from b5 last week n half ago. bmt just received it.

this is badddddddd

[dmwardjr]

Has anyone received B8 and measured the power consumption at the wall yet? 1300w + 10% seem a bit on the high side, completely capping a 15a120v breaker and leaving no headroom for OC or anything.

My B8 pulled 1362w from the wall with a platinum PSU running on 240v at 700MHz. Would be closer to 1400w if running on 120v instead due to PSU efficiency loss on 120v.

Yeah, the 240v do get 2%~ more efficiency. Thanks for the number, but i'm not sure i want to buy a 400$ ATX PSU to get 94% on 120v.

Maybe i could find some quiet 1600w sever PSU that is quiet?

The two 1100w PSU i have would not work very well here.

GET THIS:  https://bitcointalk.org/index.php?topic=1178099.0

WITH 2 OF THESE:  http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.XIBM+2000+BB.TRS0&_nkw=IBM+2000+BB&_sacat=0

He's limited to 120v I believe, which limits him to high end ATX if he wants over ~1000w or so.

Yeah i'm in an appartment so i don't have a lot of options when it comes down to 240v.

Well, i could like, unplug my oven and find a way to bring that 240v all the way to the living room window, then with 40A available i could get those. Is that the two PSU you plug with one jabberwock board and you can control voltage and power like 3 S7?

That is correct.  You could power 3 x S7's IF they were about 1333 watts each or less.  Others here would be able to give you advice as to whether it's okay to do that or not.  I say this cause 3 x S7's would be pushing the 2 x IBM 2000 BB's to their limits.  I have little experience with the IBM 2000 BB's.  I'm about to get a couple of them to go along with a new J4bberwock breakout board for them.  All of my PSU's are IBM 2880's with J4bberwock breakout boards.

[dmwardjr]

Went ahead and bought some more S7s Batch 8.  These are my first Batch 8.  I am hoping these will be good for the long run!

i received 2 b8 yesterday & each of them messed up.

1 dead board 0 temps with lovely dashes, nothing could revive them. shows 30 instead of 45 chips. if test with single board it shows 0 temp & 48 magical chips but do not hash.

the other had a almost dead board with low hashrate, high hw error, low temp (5 or more C) lower than other 2 boards. once i disconnected the problematic board the other 2 works perfectly no issues.

i sent 1 board from b5 last week n half ago. bmt just received it.

this is badddddddd

Sorry to hear that yslyung.  It sounds like you have been a bit more unfortunate than most.  Hopefully, things can only get better...  

[dmwardjr]

At 700MHz they're pretty much tapped out, and overclocking is not an option until we figure out how to control voltage. My OG S7s run at 6TH/s in comparison with overclocking.

I totally agree with you.  I'm coming close to making the decision to go ahead and under clock these back to 600 MHz from the 700 MHz factory setting.  If I'm not mistaken, the batch 6 (135 chips) were clocked at 600 MHz and hashed at 4.0 TH/s?  I'm thinking about treating the new 135 chip rigs as batch 6 and under clock all of them to 600 MHz for longevity.

[VirosaGITS]

Has anyone received B8 and measured the power consumption at the wall yet? 1300w + 10% seem a bit on the high side, completely capping a 15a120v breaker and leaving no headroom for OC or anything.

My B8 pulled 1362w from the wall with a platinum PSU running on 240v at 700MHz. Would be closer to 1400w if running on 120v instead due to PSU efficiency loss on 120v.

Yeah, the 240v do get 2%~ more efficiency. Thanks for the number, but i'm not sure i want to buy a 400$ ATX PSU to get 94% on 120v.

Maybe i could find some quiet 1600w sever PSU that is quiet?

The two 1100w PSU i have would not work very well here.

GET THIS:  https://bitcointalk.org/index.php?topic=1178099.0

WITH 2 OF THESE:  http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.XIBM+2000+BB.TRS0&_nkw=IBM+2000+BB&_sacat=0

He's limited to 120v I believe, which limits him to high end ATX if he wants over ~1000w or so.

Yeah i'm in an appartment so i don't have a lot of options when it comes down to 240v.

Well, i could like, unplug my oven and find a way to bring that 240v all the way to the living room window, then with 40A available i could get those. Is that the two PSU you plug with one jabberwock board and you can control voltage and power like 3 S7?

That is correct.  You could power 3 x S7's IF they were about 1333 watts each or less.  Others here would be able to give you advice as to whether it's okay to do that or not.  I say this cause 3 x S7's would be pushing the 2 x IBM 2000 BB's to their limits.  I have little experience with the IBM 2000 BB's.  I'm about to get a couple of them to go along with a new J4bberwock breakout board for them.  All of my PSU's are IBM 2880's with J4bberwock breakout boards.

Well i could grab a one IBM kit from Finksy, that would work for 2 S7 too. Still the problem remain getting access to 240v. Beside my oven, i don't see how. And on 120v, the S7 is a big piece.

I would be much happier if the S7 was a 2 board thing. 800-1000w would be very manageable and it would be easier to OC.

[dmwardjr]

Well i could grab a one IBM kit from Finksy, that would work for 2 S7 too. Still the problem remain getting access to 240v. Beside my oven, i don't see how. And on 120v, the S7 is a big piece.

I would be much happier if the S7 was a 2 board thing. 800-1000w would be very manageable and it would be easier to OC.

I don't want to tell you what to do in your apartment; in terms of getting access to 240 volts.  I would recommend talking to an electrician or the maintenance person for the apartments to see about access to 240 volts.  You might be surprised to find the maintenance person will be cooperative and help.  Especially, if you provide the wiring, breaker and outlet; along with some extra cash.

[VirosaGITS]

Well i could grab a one IBM kit from Finksy, that would work for 2 S7 too. Still the problem remain getting access to 240v. Beside my oven, i don't see how. And on 120v, the S7 is a big piece.

I would be much happier if the S7 was a 2 board thing. 800-1000w would be very manageable and it would be easier to OC.

I don't want to tell you what to do in your apartment; in terms of getting access to 240 volts.  I would recommend talking to an electrician or the maintenance person for the apartments to see about access to 240 volts.  You might be surprised to find the maintenance person will be cooperative and help.

Not allowed to do modification here because of assurance thing stuff. There's nearly no 240v anywhere here, either. I'm guessing we're not allowed to because of set of rules and regulation, limits and whatnot.

I live in an multi complex apartment that is owned by a huge company, so their set of rules are pretty strict. Signed a 4 page full of rules and regulation to follow when i got here, lol.

I'll see for when i move maybe this summer.

Are 240v outlet all standard? If i get a 240v big cord extension and maybe some sort of PDU, since the oven socket is 40A, then maybe it would be easy to make use of it on real 240v when i move?

[Prelude]

Has anyone received B8 and measured the power consumption at the wall yet? 1300w + 10% seem a bit on the high side, completely capping a 15a120v breaker and leaving no headroom for OC or anything.

My B8 pulled 1362w from the wall with a platinum PSU running on 240v at 700MHz. Would be closer to 1400w if running on 120v instead due to PSU efficiency loss on 120v.

Yeah, the 240v do get 2%~ more efficiency. Thanks for the number, but i'm not sure i want to buy a 400$ ATX PSU to get 94% on 120v.

Maybe i could find some quiet 1600w sever PSU that is quiet?

The two 1100w PSU i have would not work very well here.

GET THIS:  https://bitcointalk.org/index.php?topic=1178099.0

WITH 2 OF THESE:  http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.XIBM+2000+BB.TRS0&_nkw=IBM+2000+BB&_sacat=0

He's limited to 120v I believe, which limits him to high end ATX if he wants over ~1000w or so.

Yeah i'm in an appartment so i don't have a lot of options when it comes down to 240v.

Well, i could like, unplug my oven and find a way to bring that 240v all the way to the living room window, then with 40A available i could get those. Is that the two PSU you plug with one jabberwock board and you can control voltage and power like 3 S7?

That sounds like you'd be seriously compromising your living space...

You should make or buy a wiring harness that combines 2 different 120v circuits into 1 240v circuit.

Biodom, I meant original gangster lol. Basically, any 165 chip batch.

[Biodom]

At 700MHz they're pretty much tapped out, and overclocking is not an option until we figure out how to control voltage. My OG S7s run at 6TH/s in comparison with overclocking.

I totally agree with you.  I'm coming close to making the decision to go ahead and under clock these back to 600 MHz from the 700 MHz factory setting.  If I'm not mistaken, the batch 6 (135 chips) were clocked at 600 MHz and hashed at 4.0 TH/s?  I'm thinking about treating the new 135 chip rigs as batch 6 and under clock all of them to 600 MHz for longevity.

I got batch 6...it is totally stable being overclocked to 625, a bit less stable (or maybe less efficient?) at 650, so I will try either of these two instead of just 600, if you have room on PSU. The funny thing, if you remember as everyone was saying that B1 "likes' heat-~60C. In my observation, B6 "likes" being cold-I got better speed and less errors at 41-45C (same goes for B7, interestingly).

625-4.15-4.2 TH (1090W at the wall); 4.3 TH at 650 (1150W)

[VirosaGITS]

Has anyone received B8 and measured the power consumption at the wall yet? 1300w + 10% seem a bit on the high side, completely capping a 15a120v breaker and leaving no headroom for OC or anything.

My B8 pulled 1362w from the wall with a platinum PSU running on 240v at 700MHz. Would be closer to 1400w if running on 120v instead due to PSU efficiency loss on 120v.

Yeah, the 240v do get 2%~ more efficiency. Thanks for the number, but i'm not sure i want to buy a 400$ ATX PSU to get 94% on 120v.

Maybe i could find some quiet 1600w sever PSU that is quiet?

The two 1100w PSU i have would not work very well here.

GET THIS:  https://bitcointalk.org/index.php?topic=1178099.0

WITH 2 OF THESE:  http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.XIBM+2000+BB.TRS0&_nkw=IBM+2000+BB&_sacat=0

He's limited to 120v I believe, which limits him to high end ATX if he wants over ~1000w or so.

Yeah i'm in an appartment so i don't have a lot of options when it comes down to 240v.

Well, i could like, unplug my oven and find a way to bring that 240v all the way to the living room window, then with 40A available i could get those. Is that the two PSU you plug with one jabberwock board and you can control voltage and power like 3 S7?

That sounds like you'd be seriously compromising your living space...

You should make or buy a wiring harness that combines 2 different 120v circuits into 1 240v circuit.

Biodom, I meant original gangster lol. Basically, any 165 chip batch.

Maybe, but the current plan is 2 ATX PSU per S7 and that kind of irk me. I can't shake the feeling of wanting to do 1 PSU for one and we both know the price of 1600w PSU, which would give some leeway here.

Somehow i think i'd rather have to micro manage sometime to use my oven than have to deal with multiple PSU per miner. *shrug*

[dmwardjr]

At 700MHz they're pretty much tapped out, and overclocking is not an option until we figure out how to control voltage. My OG S7s run at 6TH/s in comparison with overclocking.

I totally agree with you.  I'm coming close to making the decision to go ahead and under clock these back to 600 MHz from the 700 MHz factory setting.  If I'm not mistaken, the batch 6 (135 chips) were clocked at 600 MHz and hashed at 4.0 TH/s?  I'm thinking about treating the new 135 chip rigs as batch 6 and under clock all of them to 600 MHz for longevity.

I got batch 6...it is totally stable being overclocked to 625, a bit less stable (or maybe less efficient?) at 650, so I will try either of these two instead of just 600, if you have room on PSU. The funny thing, if you remember as everyone was saying that B1 "likes' heat-~60C. In my observation, B6 "likes" being cold-I got better speed and less errors at 41-45C (same goes for B7, interestingly).

625-4.15-4.2 TH (1090W at the wall); 4.3 TH at 650 (1150W)

Thanks for sharing this info, Biodom

[KeezAZA]

Ordering these B8 and B9 looks risky.

I fear if I order one now. By the time i get the unit most of the warranty is over.
It takes 6-7 weeks to get anything into SA.
My S5 took 7 weeks. Two weeks sitting in SA customs.

[VirosaGITS]

Ordering these B8 and B9 looks risky.

I fear if I order one now. By the time i get the unit most of the warranty is over.
It takes 6-7 weeks to get anything into SA.
My S5 took 7 weeks. Two weeks sitting in SA customs.

SA, south America? Thats crazy, it took me a week to get my S5. losing 2 months of mining time is like saying good by to your ROI from the start, imo.

[KeezAZA]

Sorry. RSA (South Africa).
I was considering the Batch 9. but with all these issues of boards not running makes me concerned that i might get a dud and I am then stuck with more delays.

[micairvas]

Is it SF-1300F14MG strong enough for Antminer S7 device? Does this power supply have 8 or 10 PCIe connectors? Thx.

[philipma1957]

Has anyone received B8 and measured the power consumption at the wall yet? 1300w + 10% seem a bit on the high side, completely capping a 15a120v breaker and leaving no headroom for OC or anything.

My B8 pulled 1362w from the wall with a platinum PSU running on 240v at 700MHz. Would be closer to 1400w if running on 120v instead due to PSU efficiency loss on 120v.

Yeah, the 240v do get 2%~ more efficiency. Thanks for the number, but i'm not sure i want to buy a 400$ ATX PSU to get 94% on 120v.

Maybe i could find some quiet 1600w sever PSU that is quiet?

The two 1100w PSU i have would not work very well here.

you can get the 2000 watt plat

links
coming up

https://bitcointalk.org/index.php?topic=1284563.0

https://bitcointalk.org/index.php?topic=1257327.msg13383917#msg13383917

https://bitcointalk.org/index.php?topic=738527.0

http://holybitcoin.com/product/dps-2000bb-breakout-adapter-board/

[Prelude]

Has anyone received B8 and measured the power consumption at the wall yet? 1300w + 10% seem a bit on the high side, completely capping a 15a120v breaker and leaving no headroom for OC or anything.

My B8 pulled 1362w from the wall with a platinum PSU running on 240v at 700MHz. Would be closer to 1400w if running on 120v instead due to PSU efficiency loss on 120v.

Yeah, the 240v do get 2%~ more efficiency. Thanks for the number, but i'm not sure i want to buy a 400$ ATX PSU to get 94% on 120v.

Maybe i could find some quiet 1600w sever PSU that is quiet?

The two 1100w PSU i have would not work very well here.

you can get the 2000 watt plat

links
coming up

https://bitcointalk.org/index.php?topic=1284563.0

https://bitcointalk.org/index.php?topic=1257327.msg13383917#msg13383917

https://bitcointalk.org/index.php?topic=738527.0

http://holybitcoin.com/product/dps-2000bb-breakout-adapter-board/

The 2000w PSU is not platinum, in fact it's silver but pretty close to gold. It's younger and stronger 2500w brother is gold rated, though. The 2880w beast is not actually platinum either, it is solidly in silver territory. I measured about 87% efficiency. Everyone confuses it with it's younger, slightly more buff 2980w brother the 39Y7414 is platinum, and much more expensive on ebay. We're all buying the 39Y7349 which has no official efficiency numbers anywhere that I can find as it's too old to have been put through the 80+ testing program. My own testing though, puts it at about 87% efficiency at 50% load.

[elokk]

Has anyone received B8 and measured the power consumption at the wall yet? 1300w + 10% seem a bit on the high side, completely capping a 15a120v breaker and leaving no headroom for OC or anything.

I have 2 Batch8 pulling 11 amps  combined total on a pdu running bitmain 1600w psu. Another B8 running on 120v powered by Corsair rm1000 (2 boards/ 846 watts) and Corsair rm850 (1 board/controller 454 watts). My readings come from the Cyberpower battery backups so I am unsure how accurate that is. Fans running at 50% manual (setup in a back room with windows open, 30 degree F temps outside)

Temps in Missouri had been warmer previously so maybe I should drop my fan speed now that the boards are no warmer than 45 with the colder temps outside??
 

As far as the 120v/psu discussion goes, has anyone seen these?? Are they legit for running a Bitmain 1600w PSU as advertised?
http://www.ebay.com/itm/110V-to-220V-Conveter-power-up-for-BITMAIN-AntMiner-APW3-12-1600-PSU-2000W-/161918511652?hash=item25b3186a24:g:8eIAAOSwZVhWT1Pt

[notlist3d]

Has anyone received B8 and measured the power consumption at the wall yet? 1300w + 10% seem a bit on the high side, completely capping a 15a120v breaker and leaving no headroom for OC or anything.

I have 2 Batch8 pulling 11 amps  combined total on a pdu running bitmain 1600w psu. Another B8 running on 120v powered by Corsair rm1000 (2 boards/ 846 watts) and Corsair rm850 (1 board/controller 454 watts). My readings come from the Cyberpower battery backups so I am unsure how accurate that is. Fans running at 50% manual (setup in a back room with windows open, 30 degree F temps outside)

Temps in Missouri had been warmer previously so maybe I should drop my fan speed now that the boards are no warmer than 45 with the colder temps outside??
 

As far as the 120v/psu discussion goes, has anyone seen these?? Are they legit for running a Bitmain 1600w PSU as advertised?
http://www.ebay.com/itm/110V-to-220V-Conveter-power-up-for-BITMAIN-AntMiner-APW3-12-1600-PSU-2000W-/161918511652?hash=item25b3186a24:g:8eIAAOSwZVhWT1Pt

Which part of Missouri are you in?  It seems like the mid-west has been getting some cold weather lately.  But guess it could be different in some part's of mid-west.

I personally hate the idea of step-up.  Even if works I think there are better options out there.  With the way the mining industry seems to be going I would look into a true 220/240 line if at all possible.