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