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Physical/Block Diagram of Computer

Written by Parvatiandsons Team

Physical Diagram of a Computer:

A physical diagram of a computer system provides a visual representation of the actual physical components that make up the computer. Here are the key components typically found in a physical diagram of a computer:


1. Central Processing Unit (CPU): This is the brain of the computer and is represented as a microchip or a processor unit on the diagram.

2. Memory (RAM): Memory modules, often in the form of small rectangular chips or sticks, represent the computer's random access memory (RAM).

3. Storage Devices: These include hard disk drives (HDDs) and solid-state drives (SSDs), typically depicted as rectangular units for data storage.

4. Input Devices: These can include a keyboard, mouse, and other input peripherals, often shown as icons or symbols.

5. Output Devices: Monitors, printers, and speakers are examples of output devices, which are usually depicted accordingly.

6. Motherboard: The motherboard is the main circuit board that connects and houses most of the computer's components. It is typically shown as a large rectangular board with connectors and slots.

7. Power Supply: The power supply unit (PSU) is responsible for providing electricity to the computer's components and is often depicted as a box with cables.

8. Connectivity Ports: USB ports, Ethernet ports, audio jacks, and other connectors for external devices are displayed on the physical diagram.

9. Peripherals: Any additional hardware components, such as external hard drives, graphic cards, or webcams, may also be included in the diagram.


Block Diagram of a Computer:

A block diagram of a computer provides a simplified, high-level representation of the major functional components of a computer system. It abstracts the complexity of the physical components and focuses on their interactions. Here are the key blocks typically found in a block diagram of a computer:


1. Central Processing Unit (CPU): This central block represents the CPU, responsible for executing instructions and data processing.

2. Memory: This block encompasses both RAM (Random Access Memory) and storage devices, illustrating the distinction between volatile and non-volatile memory.

3. Input/Output (I/O): This block represents input and output devices, including peripherals like keyboard, mouse, monitor, and external devices.

4. Motherboard: The motherboard serves as the main platform connecting all components and is depicted as a central hub.

5. Power Supply: The power supply unit (PSU) block signifies the power source for the computer system.

6. System Bus: This block represents the communication pathways (data buses) that connect the CPU, memory, and I/O devices, facilitating data transfer.

7. Operating System: While not a hardware component, the operating system is often included as a block to emphasize its role in managing hardware resources and software applications.

8. Software: This block represents application software and user-level programs running on the computer.


Please note that the block diagram simplifies the computer system's architecture to focus on functional relationships between major components. In contrast, the physical diagram provides a detailed view of the actual hardware components and their physical connections.

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