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Author Topic: Antminer S9 replacement hash board  (Read 439 times)
jimbo215
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March 27, 2018, 06:33:26 AM
 #21

Hi, I am very interested in these replacement boards, and if you have working models, we would be interested in purchasing them.
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alex1560
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March 27, 2018, 08:33:52 PM
 #22

Hi,

We should have the second board prototype in about a week. Will inspect, test and come with a video showing the pefromance.

One thing I want to let you know is that's not going to be cheaper than what you get from Bitmain, the reason is that the IC's BM1387
are much more expensive than what Bitmain is paying to produce them, 3-4 times more expensive actually.

So expect one board to be $1000+ for low quantity order and a slight discount if ordering a big batch.

Will keep you posted.

Alex
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April 07, 2018, 02:47:59 PM
 #23

Hey guys, I can confirm that the design is proven by the second prototype board.

The issues I had with the first board were fixed and I will make a video with the working board on Monday.

The board is hashing with 4.5 TH/s . I will now continue the work on the waterblock and install it on the board
then begin tweaking settings to see what kind of overclock can be made.

CryptoStash
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April 08, 2018, 06:29:20 PM
 #24

Please contact me with your info as we'd be interested in carrying these in stock.
alex1560
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April 09, 2018, 03:33:58 PM
 #25

Hey guys,

Here's the proof I promissed. It took some time as I was getting the board working outside the aluminum case and when I was putting it inside it was showing 0 Asics found.

I had to find out that the uncovered vias used for prototyping are not very happy touching the aluminum case. I used some electrical tape to insulate the margins and it works fine.
Glad it didn't burn anything.

In the manufacturing version all the vias will be covered with solder mask so this issue will disappear.

Here's a video showing how it works:

https://www.youtube.com/watch?v=a70ns3xpKUk

In case you have any ideas on overclocking this unit, what needs to be changed, voltage, frequency or both. I plan to experiment on this after the waterblock is completed for both sides, to make sure I
get to use this board a little longer.


Have a great day!
alex1560
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April 12, 2018, 07:42:57 PM
 #26

Hey guys, a few photos of the finished board:

https://ibb.co/dy2NNS
https://ibb.co/mB6hNS
https://ibb.co/bBnBGn

anonron
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May 13, 2018, 05:28:05 PM
 #27

Hi, I just saw this thread. Are the boards ready for sale yet? I have a lot of BM1387 chips, would I be able to use them with this board to make an antminer s9? Please contact me: nikhilooga@gmail.com
alex1560
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May 14, 2018, 12:45:47 PM
 #28

Hi, I just saw this thread. Are the boards ready for sale yet? I have a lot of BM1387 chips, would I be able to use them with this board to make an antminer s9? Please contact me: nikhilooga@gmail.com

Hi, yes, the board is working properly at 4.5 TH/s. I replied you by e-mail, will continue the conversation there.

Alex
ark02
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May 17, 2018, 04:22:14 PM
 #29

Just saw your waterblock testing video!

Looks like you've made a lot of progress very quickly.

Have you figured out how to test the I2C chain efficiently to figure out which chips are faulty?
alex1560
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May 17, 2018, 05:49:10 PM
 #30

Just saw your waterblock testing video!

Looks like you've made a lot of progress very quickly.

Have you figured out how to test the I2C chain efficiently to figure out which chips are faulty?

Hi, thanks!

We did some work on the i2c which is talking with the PIC to enable the voltage for the IC's, we made it enable the board so we can
communicate with the BM's, but we stopped there as we managed to modify the original firmware to obtain the things we were after, like modifying frequency and board voltage
so we can overclock the board properly.

The controller talk via UART with the BM's. There are 2 ways to talk with the IC's.. One option which looks a bit simpler is shown on this page:
http://mightydevices.com/?p=615 .

The second way to talk is the Bitmain way which is quite complex due to the lack of docs and the not very clean code they written for the firmware.

Given the time we could put together a tool to test the IC's individually and come with a good or bad report, but we are focusing our efforts on something else right now.

In the future we might look into this as well.

BTW, for others who did not see the waterblock video, check it out https://www.youtube.com/watch?v=tj-qNBYHM0w

It turned out better than I was hoping, it keeps the local temp of the board to 41 degreese celsius just with a water radiator and a fan. I plan on installing an active water chiller
and attempt to overclock and get the most of these boards as I think they can be run at at least 8TH/s per board in normal conditions by using these dual water block system.

The best part is that these water blocks can be installed on any antminer s9 board with not too much skill required.

If you are interested to discuss more, you can join this discord channel: https://discord.gg/5Eq5hUB

alex1560
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May 18, 2018, 07:52:41 PM
 #31

Hey guys, made an overclock to 850 Megs and the board is running at 6 TH/s . Check this video for more details:

https://www.youtube.com/watch?v=WY4_iP1i2Gs

Alex
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