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Chapter 4 :: The Components of the System Unit by Mind Map: Chapter 4 :: The Components of the System Unit
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Chapter 4 :: The Components of the System Unit

The System Unit

The inside of the system unit on a desktop personal computer includes

Drive bay(s)

Power supply

Sound card

Video card

Processor

Memory

Processer

Also called the central processing unit (CPU), interprets and carries out the basic instructions that operate a computer

A processor chip generates heat that could cause the chip to burn up

Require additional cooling, Heat sinks, Liquid cooling technology

Data Representation

ASCII (American standard Code for Information Interchanges) is the most widely used coding scheme to represent data

The binary system uses two unique digits (0 and 1) bits or bytes, Analog, Digital

Memory

The system unit contains two type of memory

Volatile memory, Loses its contents when power is turned off, Example includes

Nonvolatile memory, Doesn't lose contents when power is removed, Example includes ROM, flash memory, and CMOS

three basic types of RAM chips exist

Dynamic RAM (DRAM)

Static RAM (SRAM)

Magnetoresistive RAM (MRAM)

Expansion Slot and Adapter Cards

An expansion slot is a socket on the motherboard that can hold an adapter card

An adapter card enhances functions of component of the system unit and/or provides connections to peripherals

Sound Card

Video Card

Removable flash memory in cludes

Memory Cards

USB Flash drives

PC Cards / ExpressCard modules

Ports and Connectors

A port is the point at which a peripheral attaches to or communicates with a system unit

Firewire port

Bluetooth port

SCSI port

eSATA port

IrDA port

Serial port

MIDI port

A connector joins a cable to a port

A USB port

Buses

A bus allows the various devices both inside and attached to the system unit to communicate with each other

PCI bus

PCI Express bus

Accelerated Graphics Port

USB and FireWire bus

PC Card bus

Bays

A buy is an opening inside the system unit in which you can install

A drive bay typically holds disk drives

Power Supply

The power supply converts the wall outlet AC power into DC power

Some external peripherals have an AC adapter, which is an external power supply

Putting It All Together

Home

Intel Core 2 Duo or Intel Celeron Dual Core or AMD Sempron

Minimum RAM: 2 GB

Small Office / Home Office

Intel Core 2 Quad or Intel Core 2 Extreme or AMD AthlonFX or AMD AthlonX2 Dual‐Code

Minimum RAM: 4 GB

Mobile

Intel Core 2 Extreme or AMD TurionX2

Minimum RAM: 2 GB

Power

Intel Itanium 2 or AMD Quad Core Opteronor Intel Quad Core Xeon or Sun UltraSPARCT2

Minimum RAM: 8 GB

Enterprise

Intel Core 2 Quad or Intel Core 2 Extreme or AMD AthlonFX or AMD AthlonX2 Dual‐Core

Minimum RAM: 4 GB

Keeping Your Computer or Mobile Device Clean

Clean your computer or mobile device once or twice a year

Turn off and unplug your computer or mobile device before cleaning it

Use compressed air to blow away dust

Use an antistatic wipe to clean the exterior of the case and a cleaning solution and soft cloth to clean the screen