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Bitmain is becoming an scam business, they were selling defective R4 which have been discontinued most likely for that reason.

They agreed to replace the R4 for T9 if I paid the hashing difference in hash rate, since the R4 failed with in a few days of running. I did pay for the difference in hashing rate in Bitcoins.

They have both of my T9 miners for about 6 weeks (6 weeks after being received)  and are failing to ship, 3 weeks ago they promised they would ship within 5 days and failed.

Avoid this crooks they will not honor the guarantee as they should.

Most likely they are mining with my hardware.

I initially suggested just sending them the bad parts and they refused, they said I had to ship the whole miner. They are crooks there is no reason to hold my miner with them for such a long time, they are becoming like KNC, Butterflylabs and the rest of the crooks.

who knows if they will even ship my T9 miners.

bip37 185 points 13 hours ago*
Pretty weird to have antpool.com allowing stratum commands for doing overt ASICBOOST on their production servers. You can telnet to their stratum server yourself and send the following lines and you'll get evidence that there's functions on the remote server for handling the patented version of ASICBOOST.

SEND {"id": 0, "method": "mining.subscribe", "params": ["bmminer/2.0.0"]}
SEND {"id": 0, "method": "mining.multi_version", "params": [2,4,6]}
RECV {"result": null, "id": 0, "error": [20, "_stratum_mining_multi_version() takes exactly 2 positional arguments (4 given)", "Traceback (most recent call last):\n  File \"/opt/eloipool-server/eloipool/stratumserver.py\", line 199, in found_terminator\n    rv = getattr(self, funcname)(*rpc['params'])\nTypeError: _stratum_mining_multi_version() takes exactly 2 positional arguments (4 given)\n"]}

I've also got overt ASICBOOST operating on my Antminer, it needs enabling in a hidden configuration (and a pool that supports it). Open up /config/bmminer.conf and look at the last setting.

{
...
"multi-version" : "1"
}

To enable multi-version needs to be >1, the number being how many bits of the version number you're allowing it to modify for ASICBOOST. Enabling this will cause a new field in mining.submit which includes which version number it ended up using for the share solve, the pool server needs to be able to parse that and be able to validate it. The code for this is on github in the bit main account so don't take my word for it.

Maybe someone like Slush will make a public pool that enables people with handicapped S7, S9, R4 hardware to use ASICBOOST today and reduce their power consumption? It's a few altered responses on the stratum server and some instructions on how to modify the configuration on your miner to enable it, and you're up and running.

the ASIC supports overt and covert ASICBOOST

the FPGA in the miners sold to people supports ASICBOOST

the software in the miners sold to people supports overt ASICBOOST but it's disabled
antpool.com supports overt ASICBOOST messages

Never meant to be used for the good of the ecosystem, right?
If you believe that you're being a little bamboozled.