unit 2 computer systems...
TRANSCRIPT
Unit 2 Computer Systems
Physical Authentication Types
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THESE TWO CHIPS CONTAIN THE BULK OF THE LOGIC THAT ALLOWS A CPU TO COMMUNICATE WITH OTHER HARDWARE
The North Bridge chip is responsible for communication from the CPU to memory, the CPU to the PCI (Peripheral Component Interconnect) Express bus, and the Advanced Graphics Port (AGP) device
The South Bridge chip is responsible for communication between the CPU and other devices, such as PCI, ISA, and IDE devices.
North and South Bridge Chipsets 2
The North Bridge chip is
typically the second largest
chip (after the processor) and
also typically contains a heat
sink or a fan on top of the chip
to keep it cool.
The North Bridge chip is
typically located between the
processor and the AGP slot
The South Bridge is normally
located farther from the
processor — usually beside
the PCI slots.
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WHAT IS A BUS? Computer components communicate via buses.
A Bus is a physical Channel that carries electrical signals, usually in parallel form across the Motherboard.
The most important bus between two key parts (Motherboard and CPU) is the Front side Bus (FSB)which provides bi-directional communications channel between the CPU and the North Bridge chipset.
Other busses include AGP PCIe, PCI , ISA (expansion buses).
Bus Types 5
BUS TASKResearch the following Busses:-
Control Bus
Address Bus
Data Bus
System Bus
I/O Bus
Create a table listing itsType
Function
Role
Position
What bridge are they associated with North/South
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MOTHERBOARD BLOCK DIAGRAM
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This Motherboard block
diagram can be found within
a Motherboard manual.
The diagram identifies how
components communicate
within a computer.
Northbridge = fast
communications, fastest
being Front side Bus (FSB).
Southbridge = Slower
communications.
CACHE MEMORY
Cache memory a is fast SRAM (static) memory, that does not need refreshing.
Cache is fast an expensive and is usually found as Kilobytes or Megabytes.
Cache can be found on processors as L1 and L2 cache.
Cache can also be found on Hard disks (aka buffer).
Cache is used to speed up bottlenecks to include commonly used data or data that the processor may require soon.
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DATA COMMUNICATION SPEEDS FAST TO SLOW?
Processor (fastest component) L1 Cache
L2 Cache
L3 Cache
RAM
Hard disk & other South Bridge devices
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OVERVIEW OF COMPONENT SPEEDS
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The CPU is the fastest device in the system and it needs to fetch and store information to and from RAM.
RAM is slower as it is based on dynamic RAM (which means the memory needs refreshing periodically rendering it unreadable during refresh.
Cache (Fast SRAM) is used to attempt to resolve any wait states.
When the CPU requires info from RAM it also reads in what it thinks it may need soon (to Cache).
When the processor needs further information it looks at the cache first (L1) , L2 & L3 cache can be on the processor or on the motherboard .
Cache is usually a small amount of fast SRAM (static) RAM that does not need to be refreshed, as it is fast it is costly!
Loading a file for the first time, will be loaded from the Hard disk into RAM via the processor. The application will stay in RAM for the time it is being used and may stay in the RAM after being closed until eventually it is dropped out of RAM.
QUIZ TIMELog in to Your Space and take the Hardware Quiz under lesson 5 Motherboards
1. Hardware Quiz - QUIA – Hardware
2. Hardware Quiz - CompTIA A+ Hardware
3. Hardware Quiz - How stuff works
Screen grab your results add to a word document and submit to your-space.
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COMPUTER DIAGRAM
Continue your computer Diagram
Include the North and South Bridge information.
Diagram lesson 3 A1
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WHAT DO WE KNOW
What is the fastest Bridge?
What is attached to a PCI Bus?
What Bridge is associated with Ram?
Which bridge is associated with CMOS?
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