CPU frequency problem Aspire 5 randomly varying between near-base-clock and max-clock values?

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SrHasslo
SrHasslo Member Posts: 23 New User
edited 4:36AM in Aspire Laptops

Can someone who knows this stuff explain what the heck this is: an Aspire 5 with a Ryzen 7 5700U and integrated graphics. I created a custom power plan in power saver mode, setting both minimum and maximum processor state to 99%. That disables Turbo Boost (which kicks in at 100%) and forces the CPU to run at its 1.8 GHz base frequency, with no variation. With that setup, I got a steady 120 fps in Minecraft, with the CPU at 65 °C—which is very satisfying.

However, I also ran a test by switching to performance mode with a 95% minimum and 100% maximum state, and then again with 100% minimum and 100% maximum. In those modes the CPU stayed below 80 °C, so I don’t see any evidence of thermal throttling. Yet my fps dropped to under 100 fps (with a lot of fluctuation). In HWMonitor I saw huge swings in the individual core clocks (this also happens often in Windows’ default Balanced mode), for example:

1700 MHz

4300 MHz

1800 MHz

i.e. randomly varying between near-base-clock and max-clock values

[Edited the thread to add issue detail]

Answers

  • Puraw
    Puraw ACE, Member Posts: 17,642 Trailblazer

    Hey—interesting experiment, but your power settings are working against each other. A 95% minimum processor state with a 100% maximum can actually force erratic boosting behavior on Ryzen mobile CPUs, especially when paired with custom or conflicting Windows power modes.

    I'd recommend resetting your power plan entirely:

    1. Go to Edit power plan → click Restore default settings for this plan.
    2. In Power & battery settings, switch to the Balanced plan with Best Power Efficiency or Balanced mode.
    3. Then go into Advanced power plan settings, expand Processor power management, and set:
      • Minimum processor state: 5% or 0%
      • Maximum processor state: 100%
      • Processor performance boost mode: Try Efficient Aggressive or Aggressive (see picture)

    That way your CPU will boost when needed, but won't randomly spike or throttle due to conflicting floor/ceiling logic. Ryzen's firmware is optimized for precision boost scaling—you’ll get more consistent performance and better thermals if you let it breathe a bit.

    Turbo Boost settings.jpg
  • SrHasslo
    SrHasslo Member Posts: 23 New User