Editing Turbo button (section)

{{short description|Computer button}}
[[File:PC-Front Turbotaste IMGP5528 smial wp.jpg|thumb|right|Case buttons including turbo button]]
[[File:486er 33MHz DX2 Double Speed Iomega Tape.jpg|thumb|The [[Light emitting diode|LED]] display showing the CPU clock frequency, in [[megahertz|MHz]], of an [[Intel 80486]] based computer. The turbo button is the small button below the segment display; the amber light above is a secondary indicator of the turbo button state.]]

On [[IBM PC compatible|IBM PC–compatible]] computers, the '''turbo button''' selects one of two run states: the default "turbo" speed or a reduced speed closer to the [[Intel 8086]] CPU. It was relatively common on computers using the [[Intel 80286]],<ref>[https://books.google.com/books?id=h6qtgYAzqDgC&pg=PA68 20-MHz 286 PCs], [[PC Magazine]], June 27, 1989</ref> [[i386|80386]] and [[i486|80486]] processors,<ref>[https://www.computerhope.com/jargon/t/turbo.htm Turbo button], Computer Hope, 10-17-2017</ref> from the mid 1980s to mid 1990s. The name is inspired by [[turbocharger]], a device which increases an engine's power and efficiency. When pressed, the "turbo" button is intended to let a computer run at the highest speed for which it had been designed.<ref>{{cite web |date=2021-01-19 |title=Intel486 SL Microprocessor SuperSet Datasheet |url=https://datasheet.datasheetarchive.com/originals/scans/Scans-101/DSAIHSC000148912.pdf |archive-url=https://web.archive.org/web/20221021042430/https://datasheet.datasheetarchive.com/originals/scans/Scans-101/DSAIHSC000148912.pdf |archive-date=2022-10-21 |archive-format=PDF |access-date=2022-10-21 |website=datasheetarchive.com}}</ref>