System Unit Components

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 System Unit Components

The system unit (also called the computer case or chassis) houses essential computer components. Here are the key components inside a system unit:

1. Motherboard

  • The main circuit board that connects all components.
  • Contains the CPU socket, RAM slots, expansion slots, and ports for external devices.

2. Central Processing Unit (CPU)

  • The "brain" of the computer that processes instructions.
  • Examples: Intel Core, AMD Ryzen, Apple M-series.

3. Random Access Memory (RAM)

  • Temporary memory that stores data for quick access.
  • Affects system speed and multitasking performance.

4. Storage Devices

  • Hard Disk Drive (HDD) – It is Uses spinning disks to store data.
  • Solid-State Drive (SSD) – Faster, more reliable storage with no moving parts.

5. Power Supply Unit (PSU)

  • Converts electricity from AC (wall socket) to DC (usable by components).
  • Supplies power to the motherboard, CPU, and other parts.

6. Cooling System

  • CPU Fan & Heatsink – Keeps the processor from overheating.
  • Case Fans – Improve airflow inside the system unit.
  • Liquid Cooling (optional) – Used in high-performance setups.

7. Expansion Cards (Optional)

  • Graphics Card (GPU) – Enhances visual performance (e.g., NVIDIA, AMD).
  • Sound Card – Improves audio output.
  • Network Interface Card (NIC) – Provides wired/wireless network connectivity.

8. Input/Output (I/O) Ports

  • USB Ports – Connect peripherals like keyboards, mice, and flash drives.
  • Audio Jacks – For speakers, microphones, and headphones.
  • HDMI, DisplayPort, VGA – Connect monitors and display devices.

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