Mac pro 4,1 5,1 cpu Tray Interchangeability

[Anton41]

Can a 2010 5,1 Mac Pro single cpu take in a 2009 4,1 dual cpu tray?
What compatibility issues exist? ex. Firmware, Model...

 

[flowrider]

Asked and answered here:

https://forums.macrumors.com/threads/mac-pro-4-1-cpu-tray-in-5-1.1870311/

The answer is no.

Lou

 

[VaZ]

Asked and answered here:

https://forums.macrumors.com/threads/mac-pro-4-1-cpu-tray-in-5-1.1870311/

The answer is no.

Lou

Actually they do work. Boots up no problem. Great for troubleshooting. Just the fans rev to max.