Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 198. (Read 528055 times)

Mine generally ran at 48 to 54 C. So it's been easier to keep it at lower temps than the S5s.

My batch 5 - ordered 03/11 shipped 18/11 ...so this time is Bitmain better then promised

Batch 5 Shipped

Order Date 2015-11-04

Batch 5 shipping notification.  So far UPS just says "A UPS shipping label has been created. Once the shipment arrives at our facility, the tracking status--including the scheduled delivery date--will be updated."

post your temps ?

i find that it works best @ 60 deg C

Thx- my heart rate just went down to normal.

Anyone know if BITMAIN will jave black friday offers?did they have any last years?

Thank you everyone for references!  I found a local colocator and signed with them today.  Again Thanks!

How many do you have?

I think the issue is that someone who was linked to that scam now works for them. I'm just sharing my experience, and I've only dealt with the owner and the guy that runs the data center, not Matt Carson.

I don't recall Oregon Mines itself ever being involved in any scam, and they haven't scammed me. Quite the contrary, my SP20 chugs along, and I just have to pay my monthly invoice.

I can't remember.  Isn't that the company that helped pull off the Black Arrow scam (used to be minersource), or am I thinking of someone else?

Edit:  Oh yes.  Matt Carson, aka bobsag3.  His old scammer profile is borito4.  Maybe he has decided to go legit...

I guess I'm the odd man out here, but I've been hosting an SP20 there since March with no problems whatsoever.

Bitmain replaced my faulty boards fairly quickly, within a day of receiving the boards. Make sure to send pictures to expedite the process.

thanks for the info too...sorry to hear it
a major bummer

Thx. If they don't replace it under warranty in a timely fashion, I will not be buying another S7. Up til this incident happened, I was ready to grab one soon.

Rich addressed this in an earlier post, which see:

Thanks for your input, Rich.  It's much appreciated!!!

I think you need to take the most recent specs with a "grain of salt". They say the miner has 135 chips, which yields 45 chips on each of the 3 boards. Yet, you go and count the spots on the picture, and there are very clearly 54 ASICs shown. Those are the original boards for a 162-chip miner (i.e. Batch #1 etc.).

I think the reality gets a bit jumbled up with the various "cut and paste" actions to keep the website mostly close. I expect the website guys have every bit as much difficulty trying to keep stuff straight as we do.

Batch 8 is again with a little bit less power. How comes that batch 7 was 5.06 TH/s fast ? Is it possible, that the next patch would be more than that ?

Problem is we are in uncharted territory. S3 had a small frequency cut back on the first release, then we saw the S3+. S5 there was only one default frequency throughout. Now here we are about 10 Weeks into the S7 and we have over 8 Batches seen 6 variants and 2 different chip counts.

We are given no information as to why so all we can do is try and guess what is going on. There are only the original low res pictures and because of the warranty implications noone will take the covers off. I have seen mention of at least 3 board revisions but we cannot see if they are just cosmetic or have real changes?

Best guess has to be that there is significant variance in the way the BM1385 chip performs. It appears that this variance was only discovered when volume production started and the solution to the variance has been to produce batches with different default frequencies and latterly different chip counts to bring a voltage variable into play.

Which batch is "best" is difficult to answer, and most people will not in practice have made that choice, but will have just bought what was available when they decided to pull the trigger.

My generality would be that the higher the default frequency and the lower the core voltage the better the chip / system. So for the 162 chip system that would be Batch 7 at 625MHz and for the 135 chip system that would be Batch 8 at 700MHz. Perhaps it is no surprise that these are the latest two Batches?

However the fact that the latest two batches are the "best" in itself just raises a further question. Are they the best because Bitmain have just got together enough "good" chips to do this or have changes been made to the BM1384 chip itself?

So what about choosing between batch 7 & 8?

The core voltage in Batch 7 is 0.667V and at 625MHz this is the closest we have seen so far to the Data Sheet spec of 650MHz for that core voltage. 

Batch 8 is 700MHz but has a high core voltage of 0.8V because of the reduced chip count. This voltage is off the chart in the BM1385 Data sheet which indicates that 775MHz ought to be possible with only 0.71V on the Core.

So I think that batch 7 has the best chips and batch 8 although sounding impressive actually has a lower grade, but better than it's predecessor  Batch 6. On top of that I think they have been frugal with the truth on the efficiency of the 135 chip system. Headline is still 0.25J/GH. However on paper it calculates to 0.274J/GH, factor in their + 10% on Power and that becomes 0.301J/GH.

I think in practice with that Core Voltage it may even be worse than this and will be at least be something that can be measured without taking the lid off. 

So the above just my opinion & conclusions. I have no more real information than anyone else and do not even possess an S7.... As to what is actually going on or what flavour Tomorrows batch will be then your guess is as good as mine?

Rich

Batch 8 is up?