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