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Klipper3

INT2 ternary is equivalent to INT1 + binary mask. Nvidia supprted INT1 matrix multiply in RTX20 and RTX30 generations, nobody used it, so they removed INT1 support from RTX40 generation.
The theoretical capacity of a binary network is 69% of the capacity of a full-weight network, so it makes sense that LLM would converge to 1-bit networks in the long term.

It's nice to finally see practical networks reach the theoretical limits found in the statistical mechanics of Ising models. A good pointer to efficient 1-bit training, from the statistical mechanics point of view, is here:

https://www.pnas.org/doi/full/10.1073/pnas.0700324104