Which memory rating identifies the fastest memory?

The memory rating that identifies the fastest memory is DDR3-2000. This rating indicates that the memory operates at a data rate of 2000 MT/s (million transfers per second).

In general, the higher the number associated with the DDR rating, the faster the memory can process data. Here, DDR3-2000 surpasses DDR3-1600, which operates at 1600 MT/s, by a significant margin, demonstrating its superiority in speed and performance in most computing tasks.

When comparing DDR2-800 to the options, it's evident that DDR2 operates at a much lower speed of 800 MT/s, making it slower than both DDR3 variants. Additionally, DDR4-2400, although faster than DDR3, is not included in the correct answer because the question specifies the fastest memory listed, which specifically is DDR3-2000 in this context. Thus, while DDR4-2400 may be overall faster than DDR3 ratings, within the provided options, DDR3-2000 is the fastest specified.