How Do CPUs Tell Time: Understanding System and Real-Time Clocks
Learn how CPUs utilize internal and real-time clocks to track time and synchronize operations effectively.
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CPUs tell time using an internal clock called the system clock. This clock generates a steady stream of pulses that regulate the pace of tasks and operations. Additionally, most systems incorporate a real-time clock (RTC), a dedicated chip that tracks the actual time continuously, even when the computer is powered off, thanks to a small battery. The operating system regularly syncs with the RTC to maintain accurate timing across all processes.
FAQs & Answers
- What is a system clock in a CPU? A system clock in a CPU generates a steady stream of pulses that regulate tasks and operations within the computer.
- How does a real-time clock (RTC) work? A real-time clock (RTC) is a dedicated chip that tracks the real time continuously, even when the computer is powered off, using a small battery.
- Why do computers need to sync their clocks? Computers need to sync their clocks to the RTC to maintain accurate time across all processes and ensure proper task scheduling.
- What happens when a CPU clock fails? If a CPU clock fails, the system may experience timing issues, leading to performance degradation and unsynchronized operations.