Mac Pro 2019 CPU Upgrade, RAM even after PRAM Reset still at 2666 MHz despite using 2933 DIMMs

[Guest Dt990]

Previous with my 8-Core CPU I had bought all 2933 R-DIMMs for when it came time to upgrade, and here I am, with a w3245m.

 

Is there a trick I'm missing for getting a Mac Pro 2019 to re-register it's RAM after a CPU upgrade to 16-Core? With the old cMPs 5,1, when upgrading, you could bump the 1066 to 1333 if you had the correct DIMMs.

 

Source: MacRumors