What does overclock mean?
Overclock is a chiefly computing term for running a processor or another electronic component at a clock speed above the level for which it was designed or recommended. The practice can increase performance in demanding tasks, but it also raises power consumption and heat and may cause instability if cooling or voltage settings are inadequate. Users commonly overclock desktop CPUs and graphics processors, while manufacturers generally choose conservative factory settings to support a wide range of hardware and preserve reliability. The word can also be used figuratively for pushing a machine, service, or activity beyond its normal pace, although that usage is less formally defined. An overclock is not automatically a free improvement: a stable result depends on the component, its cooling, and careful testing. The term therefore combines a precise technical meaning with the broader connotation of making something work harder than its intended limits.
To operate a processor or other electronic component at a clock speed higher than its rated or recommended speed.
"The enthusiast overclocked the CPU only after testing several cooling configurations."
Used mainly in computing and electronics; the verb is often transitive, taking the component being modified as its object.
The use of, or configuration for, a clock speed higher than a component's rated or recommended speed.
"The technician tested a modest overclock before applying it permanently."
This use is common in technical discussions but is less frequent than the verb.
An overclock asks a chip to sprint beyond its rated pace: faster, hotter, and potentially less stable.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does overclock come from?
Overclock is a late-20th-century English compound formed from over- and clock, developed as clock rates became familiar measures of computing performance. The word literally describes operating a component beyond its intended or rated clock speed, unlike running it at the manufacturer's default settings. The shared clock element is also found in derivatives such as clockwise, counterclockwise, and anticlockwise.
Related word forms
How overclock is actually used
Chiefly a technical computing term, but it is also used informally for pushing any machine, service, or process beyond its normal pace. Transitive uses such as “overclock a CPU” are particularly common.