verb (used with object)

Computers. to modify (a hardware component, as a processor, graphics card, or memory) so as to increase the speed of that component beyond the specifications of the manufacturer: You can overclock your video card to improve its performance.

Origin of overclock

1985–90; over- + clock1 (in the sense “a circuit that governs the speed of other circuits”)
Related formso·ver·clocked, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019