TestOut LabSim A+ Certification Practice Exam

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Which type of memory expansion is not suitable for older motherboards?

DDR Memory
DDR2 Memory
RAMBUS Memory
DDR4 Memory

The correct answer is: DDR4 Memory

The type of memory expansion that is not suitable for older motherboards is DDR4 memory. This is because DDR4 technology has specific electrical and physical characteristics that differ significantly from previous memory generations. Older motherboards are typically designed to support older memory standards, such as DDR or DDR2, which have different pin configurations and voltage requirements. DDR4 memory modules have more pins (288) compared to DDR3 (240), DDR2 (240), and DDR (184), making them incompatible with earlier motherboard designs physically. Additionally, the signaling voltage for DDR4 is 1.2 volts, which is different from the higher voltages used in previous generations. Consequently, attempting to install DDR4 in an older motherboard that is not explicitly designed for it will result in failure to recognize the memory or potential damage to the board. In contrast, older memory types like DDR, DDR2, and RAMBUS are designed to work with older motherboards that were built to support those technologies.