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# What unit is typically used to measure the speed of a computer clock?

A computer's processor clock speed determines how quickly the central processing unit (CPU) can retrieve and interpret instructions. This helps your computer complete more tasks by getting them done faster. Clock speeds are measured in gigahertz (GHz), with a higher number equating to higher clock speed.

Unit of Measurement Speed

• The speed of CPU measured by unit called Hertz (Hz)
• 1 Hz represent 1 cycle per second.
• The speed of CPU is known as Computer Speed
• Measured in Hz (Cycles per second)
• CPU processes data during each cycle
• Early PCs ran at speeds such as 2MHz or 2,000,000 cycles per second:
• 1 Hz = 1 cycle per second
• 1 MHz = 1,000,000 Hz
• 1 GHz = 1,000 MHz or 1,000,000,000 Hz Modern PC CPUs are typically between 1GHz and 3GHz

CPU Speeds Measurement

The speed of a CPU is determined by an internal clock. Using a quartz crystal, the CPU clock breathes life into the CPU by feeding it a constant flow of pulses. For example, a 200MHz CPU receives 200 million pulses per second.

• CPUs are measured how fast they can process information.
• The speed is measured in Mega Hertz (million) or Giga Hertz (billion) clock cycles per second.
• A 1.1 GHz process means that the CPU can do 1.1 Billion Cycles per second!

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