The size of a register depends on the computer architecture. Registers allow the CPU to store and transfer data from one component to another. The CPU stores data temporarily in these memory locations. Registers are at the top of the memory hierarchy. Register is a small and fast storage unit. – Comparison of Key Differences Key Terms Difference Between Register and Main Memory In brief, registers are faster than the main memory. The main memory is located outside the CPU. It holds data and programs that are currently running. On the other hand, the main memory is also called the Random Access Memory (RAM). The total number of registers helps to increase the performance of the CPU. The number of available registers can change from the computer to computer. It allows the CPU to store data temporarily for processing. The main difference between register and main memory is that a register is a small and fast storage inside the CPU that holds data temporarily while the main memory is a storage component in the computer that stores data and programs currently used by the CPU.Ī register is a high-speed memory location in the CPU.
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