MP 1,1-5,1 What is my max RAM

[ashman70]

I have a 4,1 updated to a 5,1 currently with a single hex core Xeon. At the moment I have two 16GB modules for a total of 32GB. Can I add two more 16GB modules to get to 64GB or would one more 16GB module be the limit?
[automerge]1578686400[/automerge]
Think I found my answer, I have an X56xx cpu, so it seems 64GB is max.

 

[Snow Tiger]

I have a 4,1 updated to a 5,1 currently with a single hex core Xeon. At the moment I have two 16GB modules for a total of 32GB. Can I add two more 16GB modules to get to 64GB or would one more 16GB module be the limit?
[automerge]1578686400[/automerge]
Think I found my answer, I have an X56xx cpu, so it seems 64GB is max.

Max = 4 x 16GB = 64GB 1333 MHz DDR3 ECC . lower bandwidth option .

3 x 16GB = 48GB = highest bandwidth option .

 

[h9826790]

I have a 4,1 updated to a 5,1 currently with a single hex core Xeon. At the moment I have two 16GB modules for a total of 32GB. Can I add two more 16GB modules to get to 64GB or would one more 16GB module be the limit?
[automerge]1578686400[/automerge]
Think I found my answer, I have an X56xx cpu, so it seems 64GB is max.

Even though I don't think that you are really looking for this answer, but 128GB is your real max RAM.

Crazy idea. 32gb ram modules in a cMP. Anyone tried this?

Hello, everyone. Today, I installed 4 x 32 GB RAM on a 6 core MacPro 5.1 and succeeded in booting up macOS. All the steps are on my blog. (I'm Japanese so the page is in Japanese. Please translate it.) In a nutshell, I put the boot loader in two stages and start it by telling a fake memory...

forums.macrumors.com