Not RAM, Registers are the fastest memory unit in a Computer. Here is the Difference Between RAM, Cache, & Registers.
CPU Registers are temporary storage devices inside a CPU. When you give any instructions to the CPU, it stores the data in the registers till the process is completed. It can store data, addresses, and Instructions.
CPU Registers are classified into 6 types.· Memory Address Register (MAR)· Memory Buffer Register (MBR)· Memory Data Register (MDR)· Instruction Register (IR)· Program Counter (PC)· Accumulator
Difference Between Cache Memory, RAM, and Registers: Cache Memory & RAM are also storage devices that hold data temporarily.
To explain in simple words, Registers store the data before processing, RAM stores the data while the process is running, and Cache Memory stores the data after processing.
Main Differences between Cache & Registers:
Cache Stores Processed data. While Registers store Unprocessed data. Cache Memory could be located inside the CPU or on the motherboard. Whereas, Registers are a part of the CPU, built inside them.
CPU uses registers to process new data. On the other hand, it uses Cache Memory to detect previously stored data. Cache Memory Stores recently used data. Registers store the data before the CPU starts processing.
Register size determines how much information the CPU can store in it. A Register can be of sizes 1 Byte, 2 Bytes, 4 Bytes, 8 Bytes, or 16 Bytes. Having a bigger size Register can increase the performance of the CPU.
Which is Faster? Cache, RAM, or Registers: CPU Registers are not only faster than Cache & RAM, but are the fastest type of storage in a computer. Registers are also the most expensive type of computer memory.