Personal Computer - Part 1
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Transcript of Personal Computer - Part 1
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CoE 330
The Personal ComputerPart 1
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Outline
Computer System
Cases and Power Supply
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Computer system
The Personal Computer
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Computer System
Hardware
Physical equipment
Software
Operating system and programs
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Cases and power supplies
The Personal Computer
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Introduction
Computer Case
Purpose: Provide protection and support for the internal
components
Power Supply
Purpose: convert AC power to DC power
Size and shape of the computer case is determine by the
motherboard and other internal components
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Questions
What is the advantage of a small case?
What is the advantage of big case?
What happens if your power supply has only enough power
for current components?
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Computer Cases
Provides Framework to support internal components
Enclosure for added protection
Environment for efficient performance (cooling)
Made of plastic, steel, aluminum
Form factor: Size and layout
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Form Factor
Desktop Slim line
Full-sized
Tower
Mini
Full-sized
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Computer Cases a.k.a.
Computer chassis
Cabinet
Tower
Box Housing
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Computer Case
Consider the following factors when choosing a case Size of the motherboard
Number of external and internal drive locations (bays)
Available space
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Computer Case
When choosing a computer case, consider the following: Model Type (desktop or tower)
Size
Available Space
Power Supply
Appearance
Status Display
Vents
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Power Supply
Converts AC power to DC power which is required for allcomponents in the PC
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[Keyed] Connectors
Voltage Wire Color Use AT PowerSupply
Form
ATX PowerSupply
Form
ATXv12Power
Supply
Form
+12V Yellow Disk drive
motors, fans,
cooling
devices,
system bus
slots
YES YES YES
-12V Blue Some types
of serialports circuits
and early
PROM
YES YES YES
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[Keyed] Connectors
Voltage Wire Color Use AT PowerSupply
Form
ATX PowerSupply
Form
ATXv12Power
Supply
Form
+3.3V Orange Most newer
CPUS, some
type s of
system
memory,
AGP video
card
NO YES YES
+5V Red Motherboard, Baby AT
and earlier
CPUs and
mother
board
components
YES YES YES
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[Keyed] Connectors
Voltage Wire Color Use AT PowerSupply
Form
ATX PowerSupply
Form
ATXv12Power
Supply
Form
-5V White ISA bus cards
and early
PROMs
YES YES YES
0V Black Ground:
Used to
complete
circuits with
the othervoltages
YES YES YES
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AT (Advanced Technology) Power Supply
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ATX (AT Extended Power Supply)
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ATX v12 Power Supply
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More Connectors
Molex connector connects to an optical drive or hard drive
Berg connector connects to an floppy drive
20-pin or 24-pin slotted connectors connects to the
motherboard
4-pin to 8-pin auxiliary power connector supplies power to
all areas of the motherboard
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Molex Connector
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Berg Connector
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20+4-pin slotted connector
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8-pin auxiliary connector
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Remember
Be sure to choose a power supply that has morethan enough power for the current components.