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@francoisfleuret 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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"text": "@francoisfleuret Moving bits to and from memory.\nBecause of parasitic capacitance+resistance of the wires.\nThe bigger the memory, the longer the wires.\nThe main trick is to organize the memory hierarchically: registers, small on-chip SRAM, caches of various types, and external RAM.\nIt'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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