Computer speed and Measurements Unit

Computer speed and Measurements Unit

The most common measure of CPU speed is the clock speed, which is measured in MHz or GHz. One GHz equals 1,000 MHz, so a speed of 2.4 GHz could also be expressed as 2,400 MHz. The higher the clock speed, the more operations the CPU can execute per second.



Measurements Unit & Description

1 Bit: (Binary Digit) A binary digit is logical 0 and 1 representing a passive or an active state of a component in an electric circuit.

2 Nibble: A group of 4 bits is called nibble.

3 Byte: A group of 8 bits is called byte. A byte is the smallest unit, which can represent a data item or a character.

4 Word: A computer word, like a byte, is a group of fixed number of bits processed as a unit, which varies from computer to computer but is fixed for each computer.

The length of a computer word is called word-size or word length. It may be as small as 8 bits or may be as long as 96 bits. A computer stores the information in the form of computer words.


The following table lists some higher storage units −

S.No.           Unit & Description

1                  Kilobyte (KB) 1 KB = 1024 Bytes

2                  Megabyte (MB) 1 MB = 1024 KB

3                  GigaByte (GB) 1 GB = 1024 MB

4                  TeraByte (TB) 1 TB = 1024 GB

5                  PetaByte (PB) 1 PB = 1024 TB

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