Quick answer
What is CPU frequency scaling?
Frequency scaling changes the speed requested from a processor as work rises or falls, balancing latency, temperature and energy.
How to check this on your PC
- Observe CPU frequency with the PC idle
- Launch a stable CPU-bound task and watch each core
- Compare the current power plan with an alternate plan, restoring it afterward
How to confirm the result
Frequency should respond to changes in workload if supported.
When comparing results, use the same power scheme, similar ambient temperature and a fixed workload. Save your starting values before experimenting so you can return to them.
Reported clocks can be affected by sampling interval and effective-clock differences.
Frequently asked questions
What is CPU frequency scaling?
Frequency scaling changes the speed requested from a processor as work rises or falls, balancing latency, temperature and energy.
What result should I check after this procedure?
Frequency should respond to changes in workload if supported. Compare the observation with a saved baseline before deciding whether to keep the change.
Which hardware limitation matters here?
Reported clocks can be affected by sampling interval and effective-clock differences. Save original settings so you can reverse any unexpected behavior.