Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 215. (Read 528055 times)

Those are not bitcoin blocks, probable a new low diff coin.

On another note, I've been reading S7 support threads lately and I'm a noticing a theme around heat related issues with the earlier batches. I wonder if they pushed the S7 family out the door a bit soon and B6 was nothing more than a drastic correction to avoid burnouts. (house fires?)

Those are not bitcoin blocks, probable a new low diff coin.

Well .... I think I used up my luck for the year ....

I found 4 blocks in 3 days ... with an S5...


Too bad I was not solo mining ....

why not? they seem to be selling.

On the Chinese page, I Bing translated the following on S7 for sell there:

Ant mine S7 third instalment sale, shipment date is December 02-December 12, the price is 2500 per t, order order, may be shipped in advance. Ant mine S7 using the 28 nanometer full custom IC BM1385. Count 4.46T, 1160 w power consumption, dual fan, separate heat sink.

Translated specs:

1. is rated: 4.05 TH/s
2. power on the wall: 1042 w +10% (bit-city, APW3-1600-Watt power supplies, AC/DC 93% efficiency, 25 ° c ambient temperature)
3. power: 0.25 j/GH (wall, AC/DC 93% efficiency, 25 ° c ambient temperature)
4. rated voltage: 12V ± 5%, should not be less than 12.0V
5. chip size: 135 BM1385
6. dimensions: 301 mm (l) *123 mm (w) *155 mm (h)
7. cooling: 2x12038 fan
8. working temperature: 0 ℃ to 40 ℃
9. network connection: Ethernet

I just think it's odd it says, 4.6 TH/s @ "1,160" watts on the Product page.  Then you click the product (S7) and the specifications say, 4.05 TH/s @ "1042" watts

do we know for sure there will be an batch 7 ?

my poor poor f5 button

I wonder how long we will have to wait before we see a picture or for someone not worried about Warranty to take one apart?

In prospect I prefer the spec of the 135 Chip system as I think it will be less on edge and will provide more scope for Under & Over Clocking and Volting.

In the meantime we will continue to speculate, which is of course a major facet of this game. 

Rich

That's my main question as well.  More chips equals less voltage dropped across each while achieving more hashing power from more chips.  Less chips equals more voltage drop across each chip but with less hashing power because of fewer chips.  One can't help but wonder if this rig is going to be 0.8V Core Voltage with 12 Volts Source Voltage.

It will be interesting to see the performance level from those who receive them who will share in the forum.  I almost bought a couple of them but held off.  Mainly because I want to see the actual performance before taking the plunge.  I believe I'm still diving in regardless.  I just want to see what I'm actually getting before I purchase.

Jury is still out on exactly what they have done, however I think it is highly unlikely that they would use multiple board types. These were my thoughts on the 135 chip Batch 6.

https://bitcointalksearch.org/topic/m.12902245
https://bitcointalksearch.org/topic/m.12911092

However for me the big outstanding issue is if this is a 15 Node chain with a resultant 0.8V Core Voltage, what has really happened to the Power Consumption & J/GH?


Rich

I missed getting an S7 B6 unit. I was gathering up some coins. Hopefully there will be a B7 before Chinese new year.

Here's a different spin on the S7 B6 unit:

1) 4050 GH/s, 135 chips

This works out to 4050/135 = 30 GH/s per chip.

Now to compare it to the S7 b1 batch, take 162 x 30 GH/s = 4860 GH/s.

So the fact that the B1 and B6 batch chips hash rate jibe means that you are most likely not getting any fallout or out of spec chips.

2) 135/162 = 0.83

So if the B6 and the earlier batches have the same footprint, is there a technical reason to cut down the power by 17%?:

a) If the majority of the 27 chips were removed from the middle board, this might point to a heat dissipation issue. The problem with this is the stocking of multiple boards.

b) If they were equally removed from each board, this might point to a some sort of board power bus issue.

c) Furthermore because the boards get warmer the farther away the air intake is, hopefully the missing chips are from the warmer end. Finally because each chip has it's own finned heat sink, less heat sinks mean better air flow.

d) Numerology: The fact that 27 is divisible by 3 most likely points to the fact that the B6 boards are missing 9 chips each.

e) Supply chain issue: Do you stock two different boards or just use the same board with 9 chips deactivated? The fact that BM didn't undervolt, underclock to get to 4050 with 162 chips may also say something.

had some small issue with my order, opened up a ticket to BMT ... how long do they take to reply normally ? anyone have any experience with support response ?