I know full well that the motherboard plays a role in how the CPU is able to perform. That wasn’t what I was asking about. I was asking about specific examples of how AMD CPUs no longer performed as they should because of motherboards not being able to provide what the CPUs needed.
The first video you posted which you cued up for me didn’t say anything about “throttling” during the first three minutes of watching it, and the second was over 30 minutes long and I’m obviously not going to sit through that waiting for someone to talk about throttling on AM4 boards.
So again: Where are all these videos about AM4 setups throttling the CPU below maximum guaranteed performance?