Computer terms and components in computer , motherboard, hard disk , drives etc

The CPU is Computing part in the computers, it consists of ALU Arthematic logic unit , we can also call it is the brain of the computer . it looks like chip , or microprocessor .

There are different companies making CPU for desk top , laptop , hand held computers , Intel , AMD ,, etc ..

The power or processing speed is depends on the clock speed of the CPU , its like 866MHZ , 1.2 Ghz

1ghz or 2.8 , 3 ghz speed ..

The clock speed is the speed at which the microprocessor executes instructions , the faster the clock speed , then the compurter is faster , it executes more instructions per second .

RAM is acronym for Random access memory , that means can be accessed randomly , it consists of memory cells , any cell memory , bytes can be accessed

Different types of RAM :

1. SDRAM ( Synchronous DRAM )

2. DRAM ( Dynamic RAM )

3. SRAM ( Static RAM )

Both types of RAMs are volatile , that means they lose their contents on power off or rebooting the computer .

Static RAM needn't to be refreshed , like Dynamic RAM , DRAM needs to be refreshed thousand times per seconds , refreshing makes it faster ,

DRAM is cheaper compared to other types of RAM

A Hard disk is removable rigid disk in the computer , it stores data and access faster than compared to other drives like Floppy or CD's or DVds . it basically contains rotating magnetic disks that spins rapidly .The platters in the hard disk fixed to a spindle on each side of platter there is a read/ write head . and each plaltter is devided in to tracks and sectors .

in other words Hard disk is a mass storage device for digital data. One or more magnetic platters in a single casing, it can store data more precisely and access it more quickly than other forms of magnetic storage.

usually Hard disk capacity depends up on the Storage capacity like 20 , 40gb , 80, 250gb ,etc , and rpm , transfer rate .

Mother boards is the basic circuit board in the computer , Usually all the components like CPU , Hard disk , RAM , video card , LAN card , or sound card , Floppy drive and CD/DVD rom Drives are conncted to it .

The main printed circuit board in a computer that carries the system buses. It is equipped with sockets to which all processors, memory modules, plug-in cards, daughterboards, or peripheral devices are connected.

an picture of mother board looks like below

CD/DVD drives are optical drives , which are used to read / write on CDs or DVDs

there are CD / DVD read/ writers are available in the market , usually available in internal or external CD drives ..in single CD we can store about 700 mb of data .

where as floppy drives these are magnetic types we can only store 1.44 mb of data , we have different kinds of floppy drives also available with more storage , they called as zip drives .