COMPTIA A+ Practice Exam

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Ace your COMPTIA A+ certification with our practice exam. Engage with a variety of questions including multiple choice and performance-based, complete with hints and detailed explanations. Prepare effectively and boost your confidence for the big day!

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DDR3 memory runs at what speed relative to the motherboard bus speed?

  1. 2x

  2. 3x

  3. 4x

  4. 5x

The correct answer is: 4x

DDR3 memory runs at 4 times the speed of the motherboard bus speed. This is because DDR stands for "double data rate", meaning it transfers data twice per clock cycle. So even though both the memory and motherboard bus have the same clock speed, the DDR3 memory can transfer four times as much data per clock cycle, making it effectively 4 times faster. Therefore, options A, B, and D (which are all less than 4x) are incorrect.

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