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!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What voltage does PC3-6400 use?

2.5V
1.8V
1.5V
3.3V

The correct answer is: 1.5V

PC3-6400 is a type of DDR3 memory and it uses 1.5V to operate. This type of memory module also has an operating frequency of 800MHz. Therefore, options A and B (2.5V and 1.8V) are incorrect as they are not the standard voltage for DDR3 memory. Option D (3.3V) is also incorrect as this is the standard voltage for DDR2 memory.