noun
overclocking
Computing term for running a processor or component at a higher clock speed than its rated specification.
CPUをオーバークロックすると、処理速度は上がるが発熱も増える。
Overclocking the CPU increases processing speed but also generates more heat.
クロック refers to the clock signal or clock speed itself, while オーバークロック is the act of exceeding the rated clock speed.
Borrowed from English 'overclock'.