Microcontroller stm32f401ccu6 overclocking

[brightproject]

Can be overclocked stm32f401ccu6 up to 100 MHz?
I tried to play with numbers, as they say in the article
https://stm32f4-discovery.net/2014/11/overclock-stm32f4-device-up-to-250mhz/

• Arduino_Core_STM32/variants/STM32F4xx/F401CC(F-U-Y)_F401C(B-D-E)(U-Y)/variant_BLACKPILL_F401Cx.h

  Line 143 in 987519a

  #define HSE_VALUE 25000000U

• Arduino_Core_STM32/variants/STM32F4xx/F401CC(F-U-Y)_F401C(B-D-E)(U-Y)/variant_BLACKPILL_F401Cx.cpp

  Line 97 in 987519a

  RCC_OscInitStruct.PLL.PLLN = 336;

  
  The frequency was the same as 84 MHz and did not change, even sometimes decreased.

[fpistm]

Probably, never tested. If it does not change or decreased you probably made a mistake if you change directly in the variant cpp file.

[brightproject]

Probably, never tested.

Is it generally possible to change the frequency using the API, directly from the program code?
I not found information in the wiki.

[fpistm]

https://github.com/stm32duino/Arduino_Core_STM32/wiki/Custom-definitions#systemclock_config