Question Ryzen 9 3950X Eco Mode

[Sduis]

How work Eco Mode? It only down the TDP from 105 to 65W and Lower boosts?

 

[Dj0gany]

To run at cooler temperatures,besides what you said.

 

[Sduis]

So it will be nice for my 3950X with ECO MODE on the MSI B450M PRO-M2 MAX board. When i can buy B550?

 

[Dj0gany]

I dont understand.
"When i can buy B550" i dont understand that.