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.

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