Quote from: evanescence on April 28, 2019, 12:55:31 PM

It is supposed to be based on the BM1397, correct?

https://chainbulletin.com/bitmain-announces-its-new-and-improved-7nm-mining-chip/

55J/TH seems low compared to what was initially advertised (30J/TH). Still incredibly impressive, and blowing everything else out of the water. But I wonder where this huge discrepancy is coming from.

you don't understand how they measure.

a single chip with test leads can do 30J/TH

this gear is doing 50th at 2050 watts on = normal speed that is 41J/TH

you are doing turbo numbers to mine on turbo speeds gives you a little more hash and burns power like mad.

so this gear does 41J/TH using the fans and controller on normal speed. I suspect fans and controller are at least 100 watts

so it is doing about 1950/50th = 39J/TH on normal speed

In what seems like a million years ago bit fury shows its chip in a single chip setup it did 60J/TH which when built into a big machine did about 100J/TH

Turbo should never be used at the moment with current coin prices.

Normal speed should be used at the moment with current coin prices.

But I am sure some can create an example that shows turbo is smart to do at the moment.