Primary Memory

Introduction

Primary memory, also known as main memory or RAM (Random Access Memory), is a type of computer memory that stores data and program instructions that the CPU uses while running applications.

Characteristics

• Volatile: Primary memory loses its contents when the power is turned off.
• Fast access: Primary memory provides fast access to data and instructions, allowing the CPU to process information quickly.
• Random access: Primary memory allows the CPU to access any location directly, rather than having to read the data in a specific order.

Types of Primary Memory

• RAM (Random Access Memory):
  • Used for storing data and program instructions that the CPU uses while running applications.
  • Can be further divided into DRAM (Dynamic RAM) and SRAM (Static RAM).
• Cache Memory:
  • A small, fast memory that stores frequently accessed data and instructions.
  • Helps to improve system performance by reducing the time it takes for the CPU to access main memory.

Importance

• System performance: Primary memory plays a critical role in determining system performance, as it provides the CPU with fast access to data and instructions.
• Multitasking: Primary memory allows for multitasking, as it provides a space for multiple applications to store their data and instructions.