'Consider a system with no DRAM' replaced by a 'recycling fiber loop': John Carmack envisages bold future to avoid AI-driven RAM crisis

A giant loop of fiber — some 200km — that'd mean no need for RAM ...

John Carmack proposes fiber-optic loops as high-speed AI cache

The thought experiment began with a number. Single-mode fiber optics can now transmit data at 256 terabits per second over 200 kilometers. Based on that capacity, ...