Firmware is not bad at all. My T17s draws 2150w on stock settings (40THs) with Bitmain fw, with custom fw on 45 ths, power draw is 2000w. Chip temps are 10c lower. Only objection is auto fan settings. For example chip temps are 50c and fan speed on antminer is 6000 rpm, this can be reduced a lot, also power draw will be reduced more. I hope this will be fixed with next release. Also I noticed power draw peak before miner start hashing.It goes 10-15% up, this also should be fixed. Everything else is very good. Very good software.

Bitmain firmware is crap, they release their sowtware with no testing. I installed last Bitmain S15/T15 firmware (released on beginning of January 2020) after that 3 hashing boards on my T15 antminers are dead, and one powersupply is dead, boards constantly goes off on all miners. Bitmain of course told that is my mistake. But after I flashed previouse firmware all starts to work fine.