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

[Prelude]

I just had a blade die randomly on a batch 8 S7. It now shows all dashes where the chips should be and 0c temp.

I'll be documenting the RMA process from start to finish and posting it here every time there is an update

12/28/15 Called bitmain US support and spoke with "Z", who directed me to zendesk and had me open a support ticket.
12/28/15 Created detailed support ticket containing all relevant information and a screen shot of the miner's dashboard showing the dead hash board.
Current status: Waiting for a response from bitmain.

You should have emailed directly to info@bitmaintech.com, they replaced 2 of my fried boards and a fan.

How was the service dealing with China directly? I imagine it isn't too late for me to email them instead of the US team.

See my earlier post regarding my RMA experience with Bitmain China.

I am impressed the way Bitmain handled my warranty claim. I sent an email to info@bitmaintech describing the issues I was having, only 1 out of 3 boards worked out of the box. Wrote order number and problem on the subject line. Also added type of power supply I was using, in this case a Bitmain 1600 watter, sent a picture of input voltage with a  voltmeter just in case.  Got a reply from Sherry Liu, she asked if I opened the miner yet, if not open and inspect. I found loose heatsinks and burn marks on the boards after opening up the miner. I sent pictures to Sherry. She approved the RMA and sent me prepaid shipping labels. Note because of time difference it is not fair to expect a reply within an hour or two, wait at least 24 hours or longer depending when you sent your email. After shipping out the boards, replacement boards were at my doorstep in 7 days. I ordered more than 10 S7s from Bitmain and this is the only S7 that gave me trouble, they are all hashing at their advertised speed or faster. Also it is good to be polite, I am sure Bitmain didn't mail a defective miner, things get rough during shipping.

Great, happy to see you were well taken care of. Here's hoping my experience is similar.

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[AriesIV10]

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!

[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.

[hawkfish007]

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.

Per my PDU, it takes 6 Amp, 240V. Not sure how accurate it is, prior to adding a B8, PDU was showing 17amp.

[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.

Per my PDU, it takes 6 Amp, 240V. Not sure how accurate it is, prior to adding a B8, PDU was showing 17amp.

Well that would be right about 90% efficiency for 1300W(DC)/1440W(at the wall). Some reading with a meter would be nice but even in the best case scenario, i think that is very annoying for a 120V user. Specially since from 1300w to 1500-1600w ATX psu, the price literally double.

[AriesIV10]

DANG!  Had one BURN-UP on me on startup.  Emailed Bitmain yesterday, will wait for their reply.  

When the switch does not connects the antminer immediately, this is what can happen.  The Antminer Batch 7 had the September Firmware on it when I received it and did not have perfect internet connectivity evidently.  Here is the pic.  I have tried everything to get this to run again soft/hard reboots, firmware update / backdate / reset.  Nothing seems to help.  When this happened last time, I did the troubleshooting that Bitmain asked me to do and ended up sending the boards and the controller back to them.  

[hawkfish007]

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.

Per my PDU, it takes 6 Amp, 240V. Not sure how accurate it is, prior to adding a B8, PDU was showing 17amp.

Well that would be right about 90% efficiency for 1300W(DC)/1440W(at the wall). Some reading with a meter would be nice but even in the best case scenario, i think that is very annoying for a 120V user. Specially since from 1300w to 1500-1600w ATX psu, the price literally double.

I am using Bitmain PSU which is supposed to be 93.8% efficient, apparently not.

[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.

Per my PDU, it takes 6 Amp, 240V. Not sure how accurate it is, prior to adding a B8, PDU was showing 17amp.

Well that would be right about 90% efficiency for 1300W(DC)/1440W(at the wall). Some reading with a meter would be nice but even in the best case scenario, i think that is very annoying for a 120V user. Specially since from 1300w to 1500-1600w ATX psu, the price literally double.

I am using Bitmain PSU which is supposed to be 93.8% efficient, apparently not.

Might be but saying 6 Amp is rather inaccurate since each amp there is 240watts. The way you gave round number make it sound like if its 5.8AMP it says 6 Amp, hence the need for a reading with a wattmeter. Not sure how your PDU works.

[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.

Per my PDU, it takes 6 Amp, 240V. Not sure how accurate it is, prior to adding a B8, PDU was showing 17amp.

Well that would be right about 90% efficiency for 1300W(DC)/1440W(at the wall). Some reading with a meter would be nice but even in the best case scenario, i think that is very annoying for a 120V user. Specially since from 1300w to 1500-1600w ATX psu, the price literally double.

I am using Bitmain PSU which is supposed to be 93.8% efficient, apparently not.

Might be but saying 6 Amp is rather inaccurate since each amp there is 240watts. The way you gave round number make it sound like if its 5.8AMP it says 6 Amp, hence the need for a reading with a wattmeter. Not sure how your PDU works.

My pdu does .100 so 5.9 then 6.0. So 6.0 could be 1440 or 1416 or 1464 .

[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.

[dmwardjr]

My B8 pulled 1362w from the wall with a platinum PSU running on 240v at 700MHz.

DAAAAAAAMN...  That's more than I anticipated.  What was your RPM's on the fans and temps please?

[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.

[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

EDIT:  My bad... I see now you mentioned 120V

[Prelude]

My B8 pulled 1362w from the wall with a platinum PSU running on 240v at 700MHz.

DAAAAAAAMN...  That's more than I anticipated.  What was your RPM's on the fans and temps please?

The fans would have been approximately 3k RPM with ~60-65c temps at the time.

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 won't find a 1600w server PSU that runs on 120v, much less a quiet one. I'd consider trading you my platinum unit (Antec HCP 1300w, see review on jonnyguru) for your 2 server PSUs.

[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.

[dmwardjr]

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

Thanks Prelude...

Yeah, I saw that after reading it again and edited my post.

[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...

[Prelude]

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

Thanks Prelude...

Yeah, I saw that after reading it again and edited my post.

The advice is still good, those 2kW PSUs are probably the best way to go considering you can control the noise by choosing appropriate fans. Just need to be able to tap in to 200+ volts.

[Prelude]

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.

[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?