Hi everyone,

One hashboard on one of my S9 miners is out. I contacted Bitmain by email and they keep sending me to the webpage with instructions on shipping the miners.

I am in the USA. There are two repair locations in California and one in Washington state. I tried calling them to confirm before sending out the miner but they don't respond to the phone.

The miner is still under warranty.

Anyone else with experience in sending a faulty miner for repair under warranty?

Please help me out. Thanks.

Please PM me the method. Thanks.

Thanks for your comments. Allow me to address what I can.


Indeed there are different figures for the devices. Sometimes the rates are different when the device is operated under different conditions, etc. I have tried to go with the most common reported rate.


I guess my intention was not to compare (each miner) to (all the other miners), but to compare each miner (for a certain algorithm) to all miners that (work with that algorithm). In this case, the best way to read the chart is to actually go to the algorithm you are interested in miners for, then compare efficiency specs for the miners under that algorithm. That's why I also left the hashrate units as they are typically reported, because it is not useful to compare the hashrate of say the antminer L3+ to that of antminer S9, since the former is for litecoin (scrypt algorithm) while the latter is for Bitcoin (SHA-256 algorithm), etc....


I did address this in the previous point. Efficiencies were meant to be compared only within the same algorithm, not across all algorithms/devices.


I think this is a good point and I've been trying to implement it, but the problem again is that it would only be relevant within each algorithm, not across algorithms. In order to compare profit per hash across all algorithms, it needs to turn into a full ROI calculator which would need live feeds of current prices/difficulties/etc.....

Hi Everyone.

I have attempted to put together a comprehensive comparison chart of all ASIC miners that are available on the market today (as of January, 2018). Some things to keep in mind:

   1) The chart is sorted by algorithm, then by miner efficiency
   2) I have calculated the efficiency a bit differently than all the vendors, choosing instead to divide the hashpower by the electrical power instead of the other way around. This way a larger value means a more efficient miner
   3) This chart includes all the devices I was personally able to identify. If there are other miners you think should be there but aren't please let me know
   4) I have this chart as an excel sheet but was not sure how to best imbed an excel sheet, so I am sharing it as an image for now. If you all find this useful I may transfer it to a google spreadsheet document.

Comments/suggestions are welcome.

I couldn't make the image show in the post, so here's the link.

https://ibb.co/giTCU6

Hi everyone. My business partner is in China right now trying to get a few antminer S9's from a reseller. I have 2 questions that I'm hoping anybody can help out with:

1) The seller is refusing to let my partner test the devices before making the payment. Is there a way to make sure the device is genuine and authentic without operating it first? Can the serial number be checked somewhere online?

2) Does anybody have experience with getting the devices through customs in China?

Thanks in advance.

-MS