
We love breadboards, they make prototyping easy, but they have their limitations. The way breadboards are built imposes a low maximum frequency to the design, typically less then 50 MHz. This is due to the high parasitic inductance and capacitance on solderless breadboards.
For designs that work at low frequencies, breadboards are the ideal tool for fast prototyping. For any design above a few MHz they become too noisy, so custom PCBs, or development boards are required.
Via the forum.

Is the limitation below 50 Mnz or a few megahertz?
I asked the question because It is my understanding that reactive
components in signal paths develop around the 1 Mhz frequency range
but can still be an issue at even lower frequencies if attention to layout on
the breadboard is not observed