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On GPU bus power reduction with 3D IC technologies

The complex buses consume significant power in graphics processing units (GPUs). In this paper, we demonstrate how the power consumption of buses in GPUs can be reduced with 3D IC technologies. Based on layout simulations, we found that partitioning and floorplanning of 3D ICs affect the power benefit amount, as well as the technology setup, target clock frequency, and circuit switching activity. For 3D IC technologies using two dies, we achieved the total power reductions of up to 21.5% over a baseline 2D design.