Computer Hardware and servicing.pptx

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1. NAME : HARIKRISHNAN U DEPT : III - DCE Seminar On Computer Hardware And servicing

2. CONTENT What is Computer Hardware? Components of Computer Computer Input Devices Computer Output Devices The Central Processing Unit Motherboard Computer Memory Floppy Drive Hard Disks

3. What is Computer Hardware? Computer Hardware is the physical part of the computer system, the machinery and equipment.

4. Components of Computer

5. Computer Input Devices Computer Devices that input information in the computer Examples Key Board Mouse Scanner Digital Camera

6. Computer Output Devices Computer Devices that output information from the computer. Examples Monitor Printer

7. The Central Processing Unit CPU (Central Processing Unit) also called the Microprocessor or “The Brain” of the Computer. Processor speed: The speed at which a microprocessor executes instructions. This is usually measured in megahertz (MHz). Brands of Processors include: Pentium Celeron MAC AMD Cyrix

8. PARTS OF CPU

9. MOTHERBOARD Here we see a diagram and a photo of a motherboard (or main circuit board). This one is suitable for a Pentium CPU Main circuit board inside your computer is called a motherboard

10. COMPUTER MEMORY: (RAM) Before your CPU can process any instructions you give it, those instructions must be stored somewhere, in preparation for access by the microprocessor The more memory that is available in a machine, the more instructions and data that can be stored at one time.

11. COMPUTER MEMORY: (RAM) If the computer does not have enough RAM to run an application than pieces of the running application will be stored on the Hard Drive temporarily in a method known as “Virtual Memory” and the CPU will then have to retrieve information from the virtual memory causing a bottleneck in the system. RAM is measured in bytes.

12. FLOPPY DRIVE Storage Devices -- "How it saves data and programs“ Hard disk drives are an internal , higher capacity drive which also stores the operating system which runs when you power on the computer.- " Floppy" disk drives allow you to save work on small disks and take the data with you .

13. FEATURES:- FLOPPY DISK Diskettes (Floppy Disks) Speed: Very slow! Capacity: Normally 1.44 Mbytes . Cost: Very cheap .

14. Hard Disks Speed : Very fast! The speed of a hard disk is often quoted as " average access time" speed, measured in milliseconds. The smaller this number the faster the disk. Capacity: Enormous! Often 40/80 Gigabytes. A Gigabyte is equivalent to 1024 Megabytes. Cost: Hard disks costs are falling rapidly and normally represent the cheapest way of storing data .

15. Thanks