Some operating systems such as OS X  express hard drive capacity or file size using decimal multipliers, while others such as Microsoft Windows report size using binary multipliers. Because of its physical design, the capacity of modern computer random access memory devices, such as DIMM modules, is always a multiple of a power of Decimal Value Metric As storage sizes increase and larger units are used, these differences become even more pronounced. The latter binary usage originated as compromise technical jargon for byte multiples that needed to be expressed in a power of 2, but lacked a convenient name. In the International Electrotechnical Commission IEC published standards for binary prefixes , requiring that the gigabyte strictly denote 3 bytes and gibibyte denote 3 bytes. The term gigabyte is commonly used to mean either 3 bytes or 3 bytes.
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Software allocates memory in varying degrees of granularity as needed to fulfill data structure requirements and binary multiples are usually not required. As 2 10 is approximately 10 3roughly corresponding to SI multiples, it was used for binary multiples as well. For the binary unit g&h measurement, see gibibyte.
Gigabyte – Wikipedia
For other uses, see Gigabyte disambiguation. Nevertheless, the term gigabyte continues to be widely used with the following two different meanings:. Because of its physical design, the capacity of modern computer random access memory devices, such as DIMM modules, is always a multiple of a power of This discrepancy causes confusion, as a disk with an advertised capacity of, for example, GB meaning bytes might be reported by the operating system as GBmeaning GiB.
Therefore, one gigabyte is 1 bytes. With the advent of gigabyte-range drive capacities, manufacturers based most consumer hard drive capacities in certain size classes expressed in decimal gigabytes, such as ” GB”. In the International Electrotechnical Commission IEC published standards for binary prefixesrequiring that the gigabyte strictly denote 3 bytes and gibibyte denote 3 bytes.
The binary definition uses powers of the base 2, as does the architectural principle of binary computers. Views Read Edit View history. With these prefixes, a memory module that is labeled as having the size 1 GB has one gibibyte 1 GiB of storage capacity.
This usage is widely promulgated by some operating systemssuch as Microsoft Windows in reference to computer memory e. Some operating systems such as OS X  express hard drive capacity or file size using decimal multipliers, while others such as Microsoft Windows report size using binary multipliers. The unit symbol for the gigabyte is GB. G&g 1 November G&bb article is about a multiple of bytes. Practically all manufacturers of hard disk drives and flash-memory disk devices   continue to define one gigabyte as 1 byteswhich is displayed on the packaging.
This definition is used in all contexts of science, engineering, business, and many areas of computing, including hard drive, solid state drive, and tape capacities, as well as data transmission speeds. Retrieved from ” https: Since the first disk drive, the IBMdisk drive manufacturers expressed hard drive capacities using decimal prefixes.
This definition is synonymous with the unambiguous unit gibibyte. Orders of magnitude of data.
From Wikipedia, the free encyclopedia. As storage sizes increase and larger units are used, these differences become even more pronounced.
This page was last edited on 15 Aprilat To address this ambiguity, the International System of Quantities standardizes the binary prefixes which denote a series of integer powers of However, the term is also used in some fields of computer science and information technology to denote 1 3 or 2 30 bytes, particularly for sizes of RAM.
Some legal challenges have been waged over this confusion such as a lawsuit against drive manufacturer Western Digital. The term gigabyte is commonly used to mean either 3 bytes or 3 bytes.
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It is thus convenient to use prefixes denoting powers ofknown as binary prefixesin describing them. The use of gigabyte may thus be ambiguous. Other computer capacities and rates, like storage hardware size, data transfer rates, clock speedsoperations per secondetc. Decimal Gb Metric