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

[Swimmer63]

Question for S7 -
Bitmain says all three PCIe connectors on each board must be attached.  Does anyone know if miner will work with one open on a board?  In other words is this a hard and fast rule or is this for ideal performance?

[pj40]

Question for S7 -
Bitmain says all three PCIe connectors on each board must be attached.  Does anyone know if miner will work with one open on a board?  In other words is this a hard and fast rule or is this for ideal performance?

I don't think anyone would want to risk trying that since we're talking about a $1600 piece of hardware.

[aurel57]

Question for S7 -
Bitmain says all three PCIe connectors on each board must be attached.  Does anyone know if miner will work with one open on a board?  In other words is this a hard and fast rule or is this for ideal performance?

I don't think anyone would want to risk trying that since we're talking about a $1600 piece of hardware.

If you lower the freq you could most likely get away with less PCI's plugged in. (Just not sure how low you would need to go)

[alh]

Question for S7 -
Bitmain says all three PCIe connectors on each board must be attached.  Does anyone know if miner will work with one open on a board?  In other words is this a hard and fast rule or is this for ideal performance?

I think it's unlikely anybody will publicly state that you can get by with two connections. Anecdotal information suggests that two will allow proper operation most of the time. All three are required to preserve warranty. If you only do two and one of them discolors or melts, then you'll probably be screwed as to warranty.

Also remember that with only two, they need to be high quality cables and connectors. Downclocking is also an option.

As usual, do it at your own risk.

[bbOOmm]

I am having nothing but trouble with my new S7's.

Within a day of powering them up some heat sinks came off 2 of the boards from 1 miner, resulting in 2 out of 3 boards dying.

Today the same thing happened again which also resulted in 2 boards dying. I can only see 1 loose heat sink on 1 board in the 2nd miner but I am thinking that either I can't see other loose heat sink or the sudden drop of one board caused a spike to the 2nd board which caused it to die....

Bitmain asked me to connect each hashing board one by one to see if it works. Soon after I did this 2 more heat sinks fell off right near the out fan on miner 2 which caused melting of power connectors and fan! I am trying to get my warranty which I am damn well entitled too and by doing as Bitmain asks it is causing further damage!

http://i1006.photobucket.com/albums/af186/coinbeast1/miner%202%20after%20connecting%20one%20by%20one%20picture%202_zpswhce0pr9.jpg

http://i1006.photobucket.com/albums/af186/coinbeast1/miner%202%20after%20connecting%20one%20by%20one_zpsdriandhx.jpg

Ummm, I don't think these are UL listed/approved .... ;-P

Looks like I'll be building a current monitoring system with an emergency shutdown on the power system as well as piggybacking a couple fans that are ALWAYS on. A sensitive smoke detector and A CO2 or Halon fire suppression system probably would be a good idea also ...

Oh, and make sure your home owner insurance is in good standing ... lol...

[bbOOmm]

The the heat sink issue, with them detaching and moving ... I wonder if a couple of pieces of good ol electrically insulating "fish paper" slipped between the boards would help keep them from shorting out the neighboring board and tighten up the space so they don't move around as much if they do come loose.

The fish paper cross section would be parallel to the air flow so any restriction from the fish paper would be very minimal.

I don't have my S7's yet so I can only speculate from looking at the pictures.

[AriesIV10]

Question for S7 -
Bitmain says all three PCIe connectors on each board must be attached.  Does anyone know if miner will work with one open on a board?  In other words is this a hard and fast rule or is this for ideal performance?

I think it's unlikely anybody will publicly state that you can get by with two connections. Anecdotal information suggests that two will allow proper operation most of the time. All three are required to preserve warranty. If you only do two and one of them discolors or melts, then you'll probably be screwed as to warranty.

Also remember that with only two, they need to be high quality cables and connectors. Downclocking is also an option.

As usual, do it at your own risk.

I bought a S5 from a guy that ran only 1 of 2 connectors for each of the hashboards and claimed that it ran perfectly.  The reason I know this is that this S5 would not hash at top performance....maybe because of the lack of voltage throughout the hashboard correctly.  I would not recommend this practice at all to anyone.  There needs to be an equal dispersion of current throughout the hasboards.

[AriesIV10]

I just received a shipping notice from UPS for delivery tomorrow for an order from 10/18; although, it is still showing Unshipped in Bitmain.      I still have more orders on 10/24 and 10/25.

I just received a shipping notice from BITMAIN for delivery for an order from 10/18.      I still have more orders on 10/24 and 10/25. I do believe they are catching up!!!

[pj40]

OK, another stupid question from someone who is getting his S7 delivered tomorrow.  Since I will be using separate power supplies for the hash boards, is there any concern about overheating while turning them on one at a time with the control board psu being the last one to turn on?

I'm just curious since the worry about 'internet connection' issues and fans not cooling, when they're initially powered up is that any concern?

[Biodom]

OK, another stupid question from someone who is getting his S7 delivered tomorrow.  Since I will be using separate power supplies for the hash boards, is there any concern about overheating while turning them on one at a time with the control board psu being the last one to turn on?

I'm just curious since the worry about 'internet connection' issues and fans not cooling, when they're initially powered up is that any concern?

not a concern re overheating initially as it would take it a minute or so to situate itself on your network and then hashing will build up slowly (don't expect it to jump to 4.86 in a few seconds). Wait at least 1 hr before reaching any conclusion where your miner is operating as far as speed is concerned and if high errors are seen, try soft reboot in gui (I believe that it is in system pane).

[AriesIV10]

OK, another stupid question from someone who is getting his S7 delivered tomorrow.  Since I will be using separate power supplies for the hash boards, is there any concern about overheating while turning them on one at a time with the control board psu being the last one to turn on?

I'm just curious since the worry about 'internet connection' issues and fans not cooling, when they're initially powered up is that any concern?

not a concern re overheating initially as it would take it a minute or so to situate itself on your network and then hashing will build up slowly (don't expect it to jump to to 4.86 in few seconds). Wait at least 1 hr before reaching any conclusion where your miner is operating as far as speed is concerned and if high errors is seen, try soft reboot in gui (I believe that it is in system pane).

I think that you are precisely correct when you say, "turning them on one at a time with the control board psu being the last one to turn on."  I have quite a few S7s now and have several powered by 3 power supplies and followed the power on procedure that you noted without any problems.

[aurel57]

OK, another stupid question from someone who is getting his S7 delivered tomorrow.  Since I will be using separate power supplies for the hash boards, is there any concern about overheating while turning them on one at a time with the control board psu being the last one to turn on?

I'm just curious since the worry about 'internet connection' issues and fans not cooling, when they're initially powered up is that any concern?

I am powering my S7 with 1-RM1000 and a RM850. I just left both PSU turned off, plugged all cables in and Ethernet cable then turned on the 850 first as it was just powering 1 hash board then turned on the 1000 as it's powering the other 2 boards and the controller. At first it looked to be about a 1TH short of hash so I did a soft reboot and it came right up to speed of 4.8+

[bbOOmm]

Question for S7 -
Bitmain says all three PCIe connectors on each board must be attached.  Does anyone know if miner will work with one open on a board?  In other words is this a hard and fast rule or is this for ideal performance?

It comes down to how many amps of 12VDC per Molex pin. the more amps being stuffed through each pin increases the heat generated in the pin, the pin to socket physical contact connection and at the solder connections.

Lets say the unit uses 100A of 12VDC. You have 3 Molex 6 pin connectors per hash board x 3 hash boards. In the molex connector 3 are positive DC, 3 are negative DC. I have no clue how many amps the controller uses so I'll just focus on the hash boards. ANALOGY : Picture the power supply as a water pump in a bucket. You turn on the pump, water flows through one hose,that is positive, it goes to a water cooling block for a cpu, the hot water exiting the water block enters another tube and goes back to the bucket, thats the negative.... so each positive and negative pin is a circuit and can only pump just so much through the circuit. What I'm getting at is, even though you use two pins, 1 positive and 1 negative, you are NOT adding the amperage capacity of the two pins together, both pins are the same "hose", basically, what goes through one end of the hose comes out the other.

A total of 9 Molex connectors, That would be 27 pins for positive and 27 pins for negative. 100amps of 12VDC divided by 27 equals 3.7A of 12vdc going through each pin.

Now if you reduce the amount of pins by not using ALL the molex connectors with your power supply, you will increase the current going through each pin. Using 2 Molex connectors per hash board equals 18 pins positive and 18 pins negative. 100A of 12VDC divided by 18 equals 5.5 amps going through each pin.


Each pin of the Molex Mini-Fit Jr. connector is rated for 9A maximum. So the pin and the mating connector would handle the current going through the connector if using just 2 connectors per hash board. BUT, how is the circuit board designed? Is the circuit board designed to handle the additional heat generated  by just using 2 connectors? I would not think so since adding additional layers of heat dissipating copper in the layered fiber board would cost money and we all know Bitmain is in it for the cashola.  My guess would be that if you use just 2 of the Molex connectors per hash board, you will find that the circuit board will start to discolor and or the Molex connector due to the excessive heat generated. You will also find that the voltage will drop under load at the hashboard causing inefficiency.

[B00gieman]

Thanks for all the replys that i have.

I read here that there was a problem with the internet going down.
I think that was the problem yesterday...

Since 8.00 AM from today, the miner is working as a bad ass with no worries at all.
I did not see wha was the firmware version, but i'll pass my eye on it.

[AriesIV10]

  Does anyone have any information as to WHAT IS NEXT?  

Is there going to be another type of Antminer or are they just catching up on current orders? 

[bbOOmm]

Does anyone have any information as to WHAT IS NEXT?  

Is there going to be another type of Antminer or are they just catching up on current orders?  

Bitmain is releasing a miner next week that will make the S7 obsolete. Its based on a 5.75nm process, 250TH/s in the same footprint as the S1/S3/S5/S7 ... and only uses 50watts at the wall....

[bbOOmm]

Does anyone have any information as to WHAT IS NEXT?  

Is there going to be another type of Antminer or are they just catching up on current orders?  

Bitmain is releasing a miner next week that will make the S7 obsolete. Its based on a 5.75nm process, 250TH/s in the same footprint as the S1/S3/S5/S7 ... and only uses 50watts at the wall....

LOL, obviously I'm just messing with ya ... You guess is as good as anyone elses.... only Bitmain R&D knows.

Then again, I predict an S8 or an S9... lol... obviously

[Biodom]

Does anyone have any information as to WHAT IS NEXT?  

Is there going to be another type of Antminer or are they just catching up on current orders?  

Bitmain is releasing a miner next week that will make the S7 obsolete. Its based on a 5.75nm process, 250TH/s in the same footprint as the S1/S3/S5/S7 ... and only uses 50watts at the wall....

alien technology, man, straight from KIC 8462852 (what do you think is blocking that starlight-kiccoin mining operation)  

[aurel57]

Thanks for all the replys that i have.

I read here that there was a problem with the internet going down.
I think that was the problem yesterday...

Since 8.00 AM from today, the miner is working as a bad ass with no worries at all.
I did not see wha was the firmware version, but i'll pass my eye on it.

It was posted that if the internet goes down it could over heat the miner due to the fans dropping down and the miner still hashing away. After reading that I now have a Delta fane about 3 inches in front of the intake fan blowing air into it as my internet provider is crap.

[bbOOmm]

Hmm .... I don't know what is more of an issue .... the unknowns of alien tech, or that nuclear generating station I'm building in my shed to power all my miners using the radioactive materials from smoke detectors....