Computer Hardware Chapter 2 Chapter 2: Computer Hardware Chapter Contents Sect

Computer Hardware Chapter 2 Chapter 2: Computer Hardware  Chapter Contents Sect www.phwiki.com

Computer Hardware Chapter 2 Chapter 2: Computer Hardware Chapter Contents Sect

Joey Boy,, Morning Show Host has reference to this Academic Journal, PHwiki organized this Journal Computer Hardware Chapter 2 Chapter 2: Computer Hardware Chapter Contents Section A: Personal Computer Basics Section B: Microprocessors in addition to Memory Section C: Storage Devices Section D: Input in addition to Output Devices Section E: Hardware Security Chapter 2: Computer Hardware Personal Computer Basics Personal Computer Systems Desktop in addition to Portable Computers Home, Media, Game, in addition to Small Business Systems Buying Computer System Components

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Chapter 2: Computer Hardware Personal Computer Systems Chapter 2: Computer Hardware Desktop in addition to Portable Computers The term as long as m factor refers to the size in addition to dimensions of a component, such as a system board or system unit A desktop computer fits on a desk in addition to runs on power from an electrical wall outlet Chapter 2: Computer Hardware Desktop in addition to Portable Computers A portable computer is a small, lightweight personal computer A notebook computer (also referred to as a laptop), is a small, lightweight portable computer that opens like a clamshell to reveal a screen in addition to keyboard A tablet computer is a portable computing device featuring a touch-sensitive screen that can be used as a writing or drawing pad An ultra-mobile PC (UMPC) is a small as long as m factor tablet computer designed to run most of the software available as long as larger portable computers

Chapter 2: Computer Hardware Desktop in addition to Portable Computers Chapter 2: Computer Hardware Home, Media, Game, in addition to Small Business Systems A home computer system offers a hardware plat as long as m with adequate, but not super-charged support as long as most computer applications A Media Center PC includes components as long as integrating computers, televisions, home theaters, in addition to audio systems Some of the most cutting-edge computers are designed as long as gaming Computers marketed as long as small business applications tend to be middle-of-the-line models pared down to essentials Chapter 2: Computer Hardware Buying Computer System Components Browse through computer magazines in addition to online computer stores to get a general idea of features in addition to prices Decide on a budget in addition to stick to it Make a list of the ways you plan to use your computer Select a plat as long as m Decide on a as long as m factor Select peripherals, software, in addition to accessories

Chapter 2: Computer Hardware Buying Computer System Components Instead of buying a new computer, you might consider upgrading Chapter 2: Computer Hardware Microprocessors in addition to Memory Microprocessor Basics Today’s Microprocessors R in addition to om Access Memory Read-only Memory EEPROM A microprocessor is an integrated circuit designed to process instructions Most expensive component of a computer Chapter 2: Computer Hardware Microprocessor Basics

Chapter 2: Computer Hardware Microprocessor Basics Front side bus HyperTransport Microprocessor clock Megahertz Gigahertz Word size Cache Level 1 cache (L1) Level 2 cache (L2) CISC vs. RISC technology Chapter 2: Computer Hardware Microprocessor Basics Serial processing Pipelining Parallel processing Multi-core processor Hyper-Threading Technology Chapter 2: Computer Hardware Today’s Microprocessors

Chapter 2: Computer Hardware R in addition to om Access Memory R in addition to om Access Memory is a temporary holding area as long as data, application program instructions, in addition to the operating system Chapter 2: Computer Hardware R in addition to om Access Memory Microscopic capacitors hold the bits that represent data Most RAM is volatile Requires electrical power to hold data Chapter 2: Computer Hardware R in addition to om Access Memory RAM capacity is expressed in megabytes or gigabytes Personal computers typically feature between 256MB in addition to 2GB of RAM An area of the hard disk, called virtual memory, can be used if an application runs out of allocated RAM

Chapter 2: Computer Hardware R in addition to om Access Memory RAM speed is often expressed in nanoseconds or megahertz SDRAM is fast in addition to relatively inexpensive DDR or DDR2 RDRAM is more expensive, in addition to usually found in high-per as long as mance workstations Chapter 2: Computer Hardware Read-Only Memory ROM is a type of memory circuitry that holds the computer’s startup routine Permanent in addition to non-volatile The ROM BIOS tells the computer how to access the hard disk, find the operating system, in addition to load it into RAM Chapter 2: Computer Hardware EEPROM Electrically Erasable Programmable Read-Only Memory More permanent than RAM, in addition to less permanent than ROM Requires no power to hold data

Chapter 2: Computer Hardware Storage Devices Storage Basics Magnetic Disk in addition to Tape Technology CD in addition to DVD Technology Solid State Storage Storage Wrap-up Chapter 2: Computer Hardware Storage Basics A storage medium contains data A storage device records in addition to retrieves data from a storage medium Data gets copied from a storage device into RAM, where it waits to be processed Processed data is held temporarily in RAM be as long as e it is copied to a storage medium Chapter 2: Computer Hardware Magnetic Disk in addition to Tape Technology Magnetic storage stores data by magnetizing microscopic particles on the disk or tape surface

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Chapter 2: Computer Hardware Magnetic Disk in addition to Tape Technology Hard disk platters in addition to read-write heads are sealed inside the drive case or cartridge to screen out dust in addition to other contaminants. Chapter 2: Computer Hardware A controller positions the disk in addition to read-write heads to locate data SATA Ultra ATA EIDE SCSI Not as durable as many other storage technologies Head crash Magnetic Disk in addition to Tape Technology Chapter 2: Computer Hardware Magnetic Disk in addition to Tape Technology A floppy disk is a round piece of flexible mylar plastic covered with a thin layer of magnetic oxide in addition to sealed inside a protective casing A tape drive is a device that reads data from in addition to writes data to a long stream of recordable media similar to the tapes used in audio cassettes A tape is a sequential storage medium

Chapter 2: Computer Hardware CD in addition to DVD Technology Optical storage stores data as microscopic light in addition to dark spots on the disk surface CD in addition to DVD storage technologies Chapter 2: Computer Hardware CD in addition to DVD Technology Today’s DVD drives typically have 16X speeds as long as a data transfer rate of 177.28 Mbps Three categories of optical technologies Read-only (ROM) Recordable (R) Rewritable (RW) Chapter 2: Computer Hardware CD in addition to DVD Technology CD-DA DVD-Video CD-ROM DVD-ROM CD-R DVD+R or DVD-R CD-RW DVD+RW or DVD-RW

Chapter 2: Computer Hardware Basic Maintenance Carefully use a Q-tip in addition to a can of compressed air or a vacuum cleaner to remove dust in addition to debris from your keyboard. Some liquids are difficult to remove. That can of pop Better to keep it away from your keyboard. Chapter 2: Computer Hardware Troubleshooting in addition to Repair There are several telltale signs that your computer is in trouble Failure to power up Loud beep Blue screen of death Windows Help in addition to Support Safe Mode Troubleshooting in addition to Repair Chapter 2: Computer Hardware

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