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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Which memory specification uses 168 pins?

DDR
DDR2
SDR SDRAM
DDR3

The correct answer is: SDR SDRAM

The memory specification that uses 168 pins is SDR SDRAM (Synchronous Dynamic Random-Access Memory). It was commonly used in older computer systems before the introduction of DDR types. SDR SDRAM operates in a single data rate mode, meaning it can transfer data on only one edge of the clock cycle, which contrasts with newer types of memory that use dual data rates. In contrast, DDR (Double Data Rate) memory starts at 184 pins, DDR2 also uses 240 pins, and DDR3 continues to increase pin counts to 240 as well. These newer types of memory technology not only provide higher data rates but also improved power efficiency compared to SDR SDRAM. As computer hardware continues to evolve, SDR SDRAM has largely been phased out in favor of these newer standards, which offer significantly faster performance and better energy usage.