CompTIA A+ Core 2019 (220-1001/220-1002)/PC Components Pt. 4/ System Bus clarification

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Hi @Wes Bryan.
I am so glad for having you to teaching me CompTIA A+ Core 220-1001/220-1002. You are doing a good job :)
I am trying the grasp the following points you metioned:

1. The system bus on the motherboard sets the perfomance level for everything else, what do you mean by sets the performance? I was thinking that the CPU is the one that sets the performance.

2. If the system bus is slow it doesn't matter how fast the memory and the cpu are, what do you mean? What do you mean by slow system bus or how do I know when a system bus is slow? How do I know when the system bus is not slow?

Your response is very much apprectiated.

Great question @Pwr ,

The system bus sets the stage for CPU performance in this way, the bus transfers data to be processed to and from the CPU and main memory. If the CPU is faster than the system bus, the CPU will be wasting processing cycles, waiting on data to be delivered to and from memory.

You are right that processing power is set by the CPU, but the rate at which that data is delivered to the CPU is controlled by the bus. Memory can be faster than the bus as well but there again the ability to store and retrieve data is only as fast as the interconnection between the components on the motherboard.

I hope this helps, and keep these questions coming!