One Of The Main And One Of The Most Important Components You’ll Find On The Motherboard Is The Chipset. All The Motherboard’s Will Designed With A lot Of Different Chips Scattered All Over The Motherboard.

There Are Chips For Different Things Like Chips For Bus Controller, Memory Controllers, Keyboard Controllers And So On.

So They Have A lot Of Chips Controlling Different Functions On The Motherboard.

So As Technology Progressed, Computer Engineers Decided To Reduce The Number Of Chips And Have Them In More Centralised Location.

So Instead Of Having These Different Chips Scattered All Over The Mother Board Controlling Different Functions They Reduced The Number Of Chips To Do The Same Job And Condence Them Only A Few Chips Or Which Now Called A Chipset.

And That’s What A Chipset Is,

A Chipset Is A Smaller Set Of Chips That Has Replaced A Larger Amount Of Chips.

And A Chipset’s Job Is To Control The Data Flow Between The CPU, Peripheral s, Bus slots And Memory.

So All Of The Different Parts Of The Computer, Communicate With The CPU Through The Chipset.

The Chipset Basically Consists Of Two Chips,

  1. North Bridge
  2. South Bridge

North Bride

The North Bride Is Located In The Upper Or The Northen Part Of The Motherboard Providing And You Are Looking At The Motherboard In The Up Right Position.

Its Located Near The CPU, And It Is Directly Connected To The CPU.

It Is Also Directly Connected To The Memory(RAM).

And AGP/PCI-E Express Slots

So In Order For The CPU, To Communicate With The Memory And The AGP/PCI-E Bus, It Has To Go Through The North Bridge First

So The North Bridge Acts As A Communication Middle Man, Between A CPU And AGP/PCI-E And RAM.


The Other Chip Is Called South Bridge

The South Bridge Is Located At The Bottom Or Southern Portion Of The Mother Board Near The PCI Bus Slots.

The South Bridge Connects To The PCI Bus Slots, SATA And IDE Connectors And USB Ports.

So The SOuth Bridge Is Responsible, For The Lower Portion Of The Mother Board.

While The North Bridge Is Responsible For The Upper Portion.

There Is No Direct Connection Between CPU And The Lower Portion Of The Mother Board.

So If The PCI, USB, IDE Or SATA Ports Needed To Communicate With The CPU The Information Has To Go Through The South Bridge And Up Through The North Bridge And Then To The CPU.


And That’s Because of The CPU, PCI-E/AGPAnd RAM(Memory) Are The Most Used And Most Important Components Of The Motherboard.

So The Need Of Operate At A Higher Speed Possible.

The SLOWER SOUTHBRIDGE Communicate With The PCI BUS, SATA, IDE Connectors And USB Ports.

And They Need To Be As Fast As The Other Components.


So Basically The Higher Speed Components Are Connected To The NORTHBRIDGE


The Slower Components Are Connected To The SOUTHBRIDGE.


Now Both The North And South Bridge Make These Connections To Various Parts Of The Mother Board Using PathWays Called A ‘BUS’



Bus Is Simply A Set Of Pathways That Allows Data And Signals To Travel Between Components On The Mother Board.

The Mother Board Contains Several Kinds Of Buses.

That Vary In Speed And Bandwidth.

So For Example, If A Bus Speed Is Said To Operate AT 66MHz.

Then That Means That Particular Bus Can Send Data AT 66Million Cycles Per Second.

The Higher The Bus Speed The Faster The Computer Can Send Bus Data Which Improves The Performance Of The Computer.

A Motherboard’s Bus Speed Generally Refers To The Speed Of Front Side BUS,

FRONT SIDE BUS Is The Connection Between The CPU And The Northbridge Chipset.


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