32gb memory in mac pro 5,1

[macguru9999]

What happens if you put 3 PC3-10600 32GB 32GB DDR3 1333MHz ECC memory modules in a hex core mac pro 5,1 ?

 

[Macschrauber]

Xeon X or W ?

 

[macguru9999]

W3690 at the moment. May put an X3690 in the second machine...

 

[h9826790]

I also want to know. Haven’t seen any relevant info yet.

 

[kazkus]

I did some testing 32GB memory module on MacPro5,1 in June 2019 (last month), but not with this exact configuration (W3690 and 3x32GB).
https://forums.macrumors.com/thread...tibility-and-faq.2099103/page-9#post-27466087
According to my tests, my guess is:
W3690
* Windows 10 and Linux boots, but only recognizes only 2GB.
* OS X Yosemite 10.10 - unknown (but I guess that it boots and recognizes only 2GB like Windows).
* macOS 10.11 or later does not boot.
X5690 (tested)
* Windows 10 and Linux boots with 96GB 1333MHz.
* OS X Yosemite 10.10 boots with 96GB 1333MHz.
* macOS 10.11 or later does not boot.