This isn't 10nm is it? I thought it was 16nm
Look, if you assume a 10nm chip designed as well as the S9 chips, you should be getting about 20TH @ 1400w.
If version rolling ASIC boost adds another 20%, you should be seeing ~24th at that power.
My speculation is that this is a 16nm clone of the S9 but with the ASIC boost counteracting a worse chip design to bring a *very* slight increase in efficiency.
As much as people hate Bitmain, they do seem to have the best chip designs.
Based on what theory?
They are Samsung 10nm chips.
These ever smaller nodes are geared for low-power applications -- NOT high power ones like mining. The overall power involved raise die temps far beyond what the Foundries processes are designed to allow for. As a result the only way to make the miners stable is to sandbag the operating parameters and that means a lot of *possible* efficiency gains go right out the window. Props for mining chip makers trying to push the envelope but as usual the Real World pushes back - hard.
The Ebang 10nm miner is another example of designs gone wrong...
As for theoretical gains AB may give -- so far not as-advertised...