COMPTIA A+ Practice Exam

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What bus speed does DDR2-800 support?

  1. 200MHz

  2. 266MHz

  3. 333MHz

  4. 400MHz

The correct answer is: 400MHz

DDR2-800 stands for Double Data Rate-800, meaning that it can transfer data on both the rising and falling edge of each clock cycle, effectively doubling its speed. The "800" indicates the effective clock speed, which is 800 MHz. Therefore, DDR2-800 supports a bus speed of 800 MHz, making option D the correct answer. Options A, B, and C are incorrect because they all have lower clock speeds than 800 MHz. Option A has a clock speed of 200MHz, option B has a clock speed of 266MHz, and option C has a clock speed of 333MHz.

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