asicboost 16 on the s9

has anyone here experimented with asicboost 16 on the s9? if yes, were there any positive results?

The S9 has been natively supporting ASICboost as do all pools since around 2017 so there is no 'trying it out'... You would have to have one of the earliest S9's and never upgraded the FW for it to not use ASICboost.

the s9 we work with supports asicboost but only with 4 midstate according to the articles that have been published, if asicboost is used with 16 midstates, it can increase efficiency by 15%. until now, every single pool and s9 device that we have looked at, only supports asicboost with 4 midstates. we are looking to find out whether or not s9 natively only supports asicboost with 4 midstates or the pool is the issue.

Ah, then you should edit the OP topic title like I just did to reflect your actual question... That said, it is probably a combination of both the chips and pools limiting it to 4 midstates. My guess is that the chip circuitry only supports 4 and the pools expect that. The whitepaper on AsicBoost makes mention of it increasing chip complexity and to the Foundries making chips complexity = higher cost. I seem to recall discussion long long ago when ASICboost was introduced about using more midstates introducing too much lag into the miner communications which is why using 4 was settled on as a good compromise.

thank you for the information. you seem very knowledgeable so thanks for sharing it!