TestOut LabSim A+ Certification Practice Exam

What is true about the operation of mixed memory types in a motherboard?

1. All memory will operate at the highest speed

2. All memory will operate at the lowest speed

3. They will function independently

4. Only the newest RAM will be recognized

The correct answer is: All memory will operate at the lowest speed

The operation of mixed memory types on a motherboard typically results in all memory operating at the lowest speed. This occurs because when different types of memory are present, the system will default to the limitations of the slowest RAM installed to ensure system stability and compatibility. When the motherboard detects various memory types, such as DDR3 and DDR4, it determines the speed based on the lowest common denominator. This means that if there is a mix of memory with varying speeds, the faster memory will be throttled down to match the speed of the slower memory. Thus, the overall performance of the memory subsystem is determined by the least capable module, impacting data transfer rates and system performance. Other options indicate a misunderstanding of how memory speed negotiation works. For instance, the idea that all memory would operate at the highest speed would not account for the compatibility and operational limits imposed by the slower modules. Similarly, the assertion that only the newest RAM would be recognized does not align with how computers typically handle mixed memory configurations, where all installed modules are detected regardless of their age or speed. Additionally, the notion that the memory will function independently is inaccurate because, in practice, they must work together within the constraints imposed by their slower counterparts.