What is memory channel architecture?

• A. The CPU's internal memory management unit configuration.
• B. The arrangement that increases memory bandwidth when DIMMs are populated in matched sets.
• C. A protocol for memory access over PCIe.
• D. A cache coherence scheme for CPUs.

Answer: (B)

Memory channel architecture is about how the memory subsystem is organized into multiple independent paths, or channels, from the memory controller to the DIMMs. When DIMMs are populated in matched sets across all available channels, the controller can access memory in parallel, interleaving data across channels to boost total bandwidth. In practice, evenly populated, identical DIMMs across channels maximize memory throughput and performance.

That’s why the best choice describes the arrangement that increases memory bandwidth when DIMMs are populated in matched sets. It’s not about the CPU’s internal memory management unit, a PCIe memory-access protocol, or a cache coherence scheme, which are different concepts related to other parts of the system.