I've been getting this bug for a while now, where once in a while the PC becomes unbearably slow because the CPU is being throttled to about 1 GHz at most.
It isn't a frequent issue; this will happen about once every few months.
I'm aware that this is an issue sometimes seen in laptops with power managing functions enabled that throttle CPU performance when battery is low or when temperatures are high, though this also happens on desktops.
The often recommended fix is to temporarily change the Minimum processor state in Power Plan Settings from 100% to 99% and back to 100% again, or reset the power plan(which likely also changes this setting).
See this answer for reference.
However, this only seems a symptomatic fix; the issue will not stop and will still occur at random intervals.
I've checked temperatures and those're all sitting comfortably around 60°C. The PC and it's components are about three months old. I've also had this issue on my previous desktop, strangely enough, never on any laptops I've had though. This desktop had an Intel i7 920 (2008), so that might mean this issue isn't related to the CPU manufacturer.
My question is the following:
1. What causes this issue? Is it a bug or a feature I don't understand?
2. Is there a way to permanently disable this bug or 'feature'?
Please note: this is likely not related to overheating or impending loss of power.
Hardware info and Power Plan settings:
-- Hardware Info --
CPU: AMD Ryzen 7 3700x
GPU: MSI RTX 2080
32 GB RAM
1TB SSD + 3TB HDD
Windows 10 Home edition; last update was yesterday.
Power supply is rated 700W.
-- Power plan settings: --
Hard drive
Turn off hard drive after: Never
Internet Explorer
JavaScript Timer Frequency: Maximum performance
Desktop Background settings
Slideshow: Available
Wireless Adapter Settings
Energy saving mode: Maximum performance
Sleep
Sleep after: Never
Hibernate after: Never
Allow wake-up timers: Disabled
USB Settings
USB Selective suspend setting: Disabled
Power buttons and lid
Power button action: Shut down
PCI Express
Link State Power Management: Disabled
Processor power management
Minimum processor state: 100%
System cooling policy: Active
Maximum processor state: 100%:
Display
Turn off display after: Never
