Other contributors have said "What are the four function in characteristic Hardware and there meaning?" is the same question as "What is the purpose of the Northbridge on a motherboard?" If you believe that these are not asking the same thing and should be answered differently, click here
What is the purpose of the Northbridge on a motherboard?
The motherboard is the main printed circuit board and contains the buses, or electrical pathways, found in a computer. These buses allow data to travel between the various components that comprise a...
To power the internal clock. Not needed so much now due to Internet time servers, but in earlier machines it kept the time for you even when the computer was turned off.
North bridge connects the processor, memory and video card.
South bridge connects all the peripherals whether it is connected using USB, ISA, and PCI connector.
Note. South Bridge is also connected...