Yann LeCun(@ylecun):Moving bits to and from memory. Because of parasitic capacitance+resistance of the wires. The bigger the memory, the longer the wires. The main trick is to organize the memory hierarchically: registers, small on-chip SRAM, caches of various types, and external RAM. It's all because we have to use hardware multiplexing: reusing the same multiply-accumulate unit for multiple parts of the network.

Yann LeCun

@ylecun

Professor at NYU & Executive Chairman at AMI Labs. Ex-Chief AI Scientist at Meta. Researcher in AI, Machine Learning, Robotics, etc. ACM Turing Award Laureate.

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Yann LeCun@ylecun

2026.06.27 18:34

Moving bits to and from memory. Because of parasitic capacitance+resistance of the wires. The bigger the memory, the longer the wires. The main trick is to organize the memory hierarchically: registers, small on-chip SRAM, caches of various types, and external RAM. It's all because we have to use hardware multiplexing: reusing the same multiply-accumulate unit for multiple parts of the network.

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