Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 212. (Read 527809 times)

hi everyone,
finally my s7 4.66 came. i remove all and inspect everything. but chips has a bonding glue, i couldnt see any.
so there are 18series 3parallel chip on each hash board. 12/18=0,66V ok
i am working at 11,75V(0,65V each chip) 512Mhz %50fan speed > 4,1 Th at >1020W stable 60degreesC (room condition is 27dC)
but i upload new firmware, hashing stopped, beeper always beeps and 360W idle power, red led lit.
i solve beeper problem from config page, but still NO HASHING. then i checked hash boards my other S7 controller ALL FINE with stock firmware.
i do not recommend this new firmware because it has alotof buggy.(23-10-15) i think bitmain do that willful. we are test subjects.  
when i found a solution i share here.

did bitmain create any page in here for S7 problems like S4 support thread ?
anyone has a packed old firmware image?
because everyone talk different threads in here and hard to find who is faced with same S7 problems.

I agree, it's about time for compensation.  It's been nearly 30 days since they shipped my batch 1 units which were shipped 5 days after the 10 extra delay days.

probably uneven heat distribution and temp sensor is not in the right place, hence does not shut it down promptly.

I hope I get a good one then.  I remember thinking the same thing about the S5.  My S1 was a beast, overclockable, bulletproof.  My S3's were temperamental, seemed like they needed frequent restarts of cgminer.  I have an S4 which is totally solid.  But my S5's just drop boards from time to time and it never has been addressed.  So if the S7 needs even more attention that'll be a bummer.

indeed, i found it out accidentally as well, but if controller is powered (with miner not hashing due to internet loss or something else), then fans start rotating at medium speed (at least with 10/23 system) and air is coming out warm, but not superheated.

When I try to place an order for a power supply, I get this error for over a week now:
Unknown error: null

There is nothing strange.
Powered S7 blades go warm and take power even when the  controller is not powered.
At least it happened with my all 3 not working blades.

When this happens with the warm Miner and some blades stay powered, and the controller with fans is not powered, then after a few hours something overheats . 

Weirder problems than S5 at least. I wonder why though.

The whole episode is very odd indeed.

Yes, I believe I have tried everything. 

I'm assuming you have swapped PSU's to see if it's the same results?

You are correct about the fan rarely coming on [IF AT ALL] when the 850 is pulling only 400 of it's available 850 watts.  My Corsair AX860's are the same way.  During the winter [When the ambient is very low] the fans on my AX860's would hardly ever come on.

However, what is odd with his is the bit about the controller that was taken off of a working S7 would not work on the one he initially had problems with.  THEN, when he moved the controller back to the original S7 it was taken from, he began to have the same issues with that S7.  The entire episode sounds very unusual for sure.

EDIT:  Unless he is using the same PSU on the same S7's and has not gone back to the original PSU the S7's that were working fine with before swapping controllers.
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Two entirely different systems; one bad S7 not hashing with a APW3-12-1600-B2 from Bitmain and one good S7 using its own APW3-12-1600-B2.

I run all of mine with three rm1000 for two s7.
You probably have the 850 on one hash board and the 1000 on the other two.
The 850 will only be pulling 400watts so the fan won't spin.
The 1000 fan will spin because it is pulling 800 watts.
For me all three rm1000 fans spin because they are all pulling 800 watts.
I did have a problem where one of the rm1000 did not switch on even with the jumper.
Caused the miner to think that two blades were partially on but only hashed at 1.5th.
Sometimes the controller lies. I would think that with no power to two boards that only one set of chips would show up. Not the case. I put a spare rm1000 in place of it and it worked fine after that.
I had to rma the rm1000. They sent me a brand new one. They have 5 year warranty. Ax860 ax series has a seven year warranty.
I did get four bitmain 1600 watt psu's so they would fit in a smaller rack.
They have been running fine since I got them.

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You are correct about the fan rarely coming on [IF AT ALL] when the 850 is pulling only 400 of it's available 850 watts.  My Corsair AX860's are the same way.  During the winter [When the ambient is very low] the fans on my AX860's would hardly ever come on.

However, what is odd with his is the bit about the controller that was taken off of a working S7 would not work on the one he initially had problems with.  THEN, when he moved the controller back to the original S7 it was taken from, he began to have the same issues with that S7.  The entire episode sounds very unusual for sure.  I'm kind of leaning towards a defective PSU myself.

EDIT:  Unless he is using the same PSU on the same S7's and has not gone back to the original PSU the S7's that were working fine with before swapping controllers.

I run all of mine with three rm1000 for two s7.
You probably have the 850 on one hash board and the 1000 on the other two.
The 850 will only be pulling 400watts so the fan won't spin.
The 1000 fan will spin because it is pulling 800 watts.
For me all three rm1000 fans spin because they are all pulling 800 watts.
I did have a problem where one of the rm1000 did not switch on even with the jumper.
Caused the miner to think that two blades were partially on but only hashed at 1.5th.
Sometimes the controller lies. I would think that with no power to two boards that only one set of chips would show up. Not the case. I put a spare rm1000 in place of it and it worked fine after that.
I had to rma the rm1000. They sent me a brand new one. They have 5 year warranty. Ax860 ax series has a seven year warranty.
I did get four bitmain 1600 watt psu's so they would fit in a smaller rack.
They have been running fine since I got them.

I always run static. I have too many other devices that are running dynamic.
This way if you take a power hit it will stay on the same ip.

I am running my S7 with the RM 1000 and RM 850. The only problem I have is I notice the 850 felt warm and did not see the fan running as both fans only turn on when needed so they are hard to know if the fans are working or not. I went ahead and placed a fan to blow air thru it and it's much cooler now. But they have been running the miner fine for going on a couple weeks+ now.

You could also try getting in contact with their US distributor.  I had good luck with that.  They'd probably charge you for the repair, but you'd have it much faster if your goal is a quick return.

It is not so long. I sent my S7 blades  back on Monday with UPS and today I received a tracking number.

1x S7 = 0.037 BTC per day  (PPS and Antpool)
Apparently pays shipping more , If your mining loss.

Yes, Thanks for the information.  I am prepared to pay for shipping back to Bitmain; although, the time to get to Bitmain, inspected, repaired, and returned to me is the killer.  I can remain hopeful though!!!

Haha, as you guys speak (write) I am trying it!!!   I am willing to get these running right now!  I have reflashed (resetting with paperclip until it beeps).