Describe the bug
Noctua PWM fans typically require a target frequency of 25kHz. Regardless of the PWM frequency specified, the maximum frequency is 5.367 kHz as measured with an oscilloscope. Testing done using a Raspberry Pi 4 (4GB), PWM0 (GPIO12) and PWM1 (GPIO13)
octoprint (3).log

To Reproduce
Steps to reproduce the behavior:

1. Octoprint settings -> Enclosure Plugin
2. Click on "Add Outputs"
3. Output type: PWM
4. I/O number: 13
5. Start with Server
6. PWM frequency: 25000
7. Default duty cycle: 50
8. Save settings and reboot system
9. Attach scope probe to header pins 33 (PWM1) and 34 (ground) and observe results.

Expected behavior
A stable 25kHz square wave with a 50% duty cycle should be observable on the scope.

Additional context
See attached log. Note: hardwarePWM does provide expected results.