How is the speed of DIMM measured?

The speed of DIMM (Dual In-line Memory Module) is typically measured in megatransfers per second (MT/s), which indicates the number of data transfers that can occur per second. This speed is influenced by the memory's clock frequency and its data rate; for example, DDR (Double Data Rate) memory transfers data on both the rising and falling edges of the clock cycle, effectively doubling the data rate. Additionally, the speed is often represented by its frequency, such as DDR4-2400, where 2400 MT/s refers to the effective data transfer rate.