What data bus size is characteristic of Single-Channel Memory?

The characteristic data bus size for Single-Channel Memory is 64-bit. This is because Single-Channel Memory configurations are designed to facilitate a single channel for data transfer between the memory module and the memory controller. In this setup, the 64-bit data bus allows for the simultaneous transmission of 8 bytes of data at a time. This is standard for most modern desktop systems that utilize DDR (Double Data Rate) SDRAM.

The 32-bit option typically refers to older systems and certain types of configurations where the bus width is not wide enough to accommodate the faster data rates and larger memory capacity that a 64-bit system can handle. Likewise, 128-bit, 256-bit, and other higher values are not characteristic of typical single-channel configurations and are more related to advanced multi-channel memory designs or specialized applications, such as high-performance computing graphics cards, rather than general single-channel memory setups.