System memory performance is not determined solely by the latency of the individual memory components. Performance bottlenecks are encountered in PC boards and modules as the memory size increases. Recently, many new DRAM architectures have been proposed to solve the scalability problem of systems designed using SDRAMs. Economics, system performance requirements, expandability, and ease of use will determine which of these protocols best serves the needs of future high-performance multi-media PCs, and when SDRAMs will be replaced.
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