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– size of an AVX2 vector register, present on newer x86-64 CPUs 2 9: 512 bits (64 bytes) – maximum key length for the standard strong cryptographic message digests in 2004 – size of an AVX-512 vector register, present on some x86-64 CPUs 10 3: kilobit (kbit) 1,000 bits (125 bytes) 2 10: kibibit (Kibit) 1,024 bits (128 bytes) - RAM ...
When b is 2, the unit is the shannon, equal to the information content of one "bit". A system with 8 possible states, for example, can store up to log 2 8 = 3 bits of information. Other units that have been named include: Base b = 3 the unit is called "trit", and is equal to log 2 3 (≈ 1.585) bits. [3] Base b = 10
Definition of prefixes using powers of 10—in which 1 kilobyte (symbol kB) is defined to equal 1,000 bytes—is recommended by the International Electrotechnical Commission (IEC). [28] The IEC standard defines eight such multiples, up to 1 yottabyte (YB), equal to 1000 8 bytes. [ 29 ]
In some areas of information technology, particularly in reference to random-access memory capacity, kilobyte instead typically refers to 1024 (2 10) bytes. This arises from the prevalence of sizes that are powers of two in modern digital memory architectures, coupled with the coincidence that 2 10 differs from 10 3 by less than 2.5%.
The tenth power of 2 (2 10) has the value 1024, which is close to 1000. This has prompted the use of the metric prefixes kilo, mega, and giga to also denote the powers of 1024 which is common in information technology with the unit of digital information, the byte. Units of information are not covered in the International System of Units.
1 km 2 means one square kilometre, or the area of a square of 1000 m by 1000 m. In other words, an area of 1 000 000 square metres and not 1000 square metres. 2 Mm 3 means two cubic megametres, or the volume of two cubes of 1 000 000 m by 1 000 000 m by 1 000 000 m, i.e. 2 × 10 18 m 3, and not 2 000 000 cubic metres (2 × 10 6 m 3).
First use of GB in a decimal sense in this HDD marketing survey; Figure 1 states "FIXED DISK DRIVES more than 1 GB" market size as $10,786.6 million. Webster's Ninth New Collegiate Dictionary (1987) has binary definitions for kilobyte and megabyte. kilo byte n [from the fact that 1024 (2 10) is the power of 2 closest to 1000] (1970): 1024 bytes
As 1024 (2 10) is approximately 1000 (10 3), roughly corresponding to SI multiples, it was used for binary multiples as well. In 1998 the International Electrotechnical Commission (IEC) published standards for binary prefixes , requiring that the gigabyte strictly denote 1000 3 bytes and gibibyte denote 1024 3 bytes.