3D-ProWiz: An Energy-Efficient and Optically-Interfaced 3D DRAM Architecture with Reduced Data Access Overhead

摘要

This paper introduces , which is a high-bandwidth, energy-efficient, optically-interfaced 3D DRAM architecture with fine grained data organization and activation. integrates sub-bank level 3D partitioning of the data array to enable fine-grained activation and greater memory parallelism. A novel method of routing the internal memory bus to individual subarrays using TSVs and fanout buffers enables to use smaller dimension subarrays without significant area overhead. The use of TSVs at subarray-level granularity eliminates the need to use slow and power hungry global lines, which in turn reduces the random access latency and activation-precharge energy. yields the best latency and energy consumption values per access among other well-known 3D DRAM architectures. Experimental results with PARSEC benchmarks indicate that achieves 41.9 percent reduction in average latency, 52 percent reduction in average power, and 80.6 percent reduction in energy-delay product (EDP) on average over DRAM architectures from prior work.