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Figure 2: Comparison of network energy per bit vs. network throughput (a) and the energy per bit breakdown at various throughputs (b–d) for an electrical clos network (EClos) and a photonic clos network (PClos) at the 45-nm and 11-nm technology nodes. Utilization is plotted up to the point where the network saturates (defined as the throughput where the latency reaches 3x the zero-load latency).