Which factor primarily determines the speed at which data travels in a system?

Which factor primarily determines the speed at which data travels in a system?

• A. Clock speed
• B. Instructions per cycle (IPC)
• C. Bus width
• D. RAM capacity

Answer: (C)

The speed data travels between components is determined by how much data can be moved in one bus transfer—the width of the system bus. If the bus is wider, more bits can ride the bus at the same time, so each cycle carries more information and the overall data transfer rate increases. Clock speed matters because it tells how many cycles occur each second, but a narrow bus caps how much data can be moved per cycle, creating a bottleneck that limits throughput regardless of clock speed. RAM capacity, on the other hand, is about how much data can be stored, not how quickly it’s moved. IPC affects how many instructions are handled per cycle inside the CPU, not the amount of data that can be transferred across the bus. So the bus width is the key factor that governs how fast data can travel across the system.

The speed data travels between components is determined by how much data can be moved in one bus transfer—the width of the system bus. If the bus is wider, more bits can ride the bus at the same time, so each cycle carries more information and the overall data transfer rate increases. Clock speed matters because it tells how many cycles occur each second, but a narrow bus caps how much data can be moved per cycle, creating a bottleneck that limits throughput regardless of clock speed. RAM capacity, on the other hand, is about how much data can be stored, not how quickly it’s moved. IPC affects how many instructions are handled per cycle inside the CPU, not the amount of data that can be transferred across the bus. So the bus width is the key factor that governs how fast data can travel across the system.