> The STM32H7 line is also based on a Cortex-M7, though officially only up to 550MHz. Unofficially, CPU cores on the STM32H7 parts I've worked with are often s

> The STM32H7 line is also based on a Cortex-M7, though officially only up to 550MHz. Unofficially, CPU cores on the STM32H7 parts I've worked with are often stable well into the 700+ MHz range. Peripherals are another story.