AMD and Nvidia's GPUs are currently built on 4 nm-class silicon by TSMC. And they're not exactly cheap. Meanwhile, TSMC has indicated that it would like to put the prices it charges to chip designers up. In that context, the prospect of IBM's newly announced sub-1 nm silicon is both very exciting and totally terrifying.
As for the details, IBM is claiming "the introduction of the world’s first sub-1 nanometer (nm) chip technology, featuring a revolutionary transistor architecture at the 0.7 nm, or 7 angstrom node."
It's notoriously difficult to compare silicon nodes from competing manufacturers, such as TSMC or Intel's fabs, or indeed IBM's. Moreover, the actual size of elements inside chips has become ever more disconnected from the node names, to the extent that many industry observers now consider the likes of TSMC N3 or Intel 18A to be marketing terms as opposed to technical specif...
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