The original post: /r/homelab by /u/maniamonk on 2024-12-27 08:40:51.
Hello fine people,
I'm currently running TrueNAS Scale on a Dell Precision T5820 with an Intel Xeon W-2135 processor. I currently have four 8GB modules for a total of 32GB (the S32R config in the attached table). The modules are Micron 1x 8GB DDR4-2400 RDIMM PC4-19200T-R.There are another 4 memory slots available and would like to add addition modules. The owner's manual is pretty good, but there is still a few things I'm not clear about.
My original plan was just to add an additional four identical modules and double the memory (i.e., 8x 8GB). But, it occurred to me that I could instead install the 16GB or 32GB equivalents that Micron produces. Unfortunately, 16-8-16-8-8-16-8-16 or 32-8-32-8-8-32-8-32 configurations options are not mentioned in the memory owner's manual memory configuration table. So, what I'm wondering is:
- Instead of an additional four 8GB modules, is there any reason I couldn't instead add 16GB or 32GB modules?
- Do I have to add four modules or could I simply add two (e.g., 4x 8GB + 2x 16GB)?
- Of course the memory channels need to be paired, but do the larger modules need to be in the lower DIMMs (e.g., DIMM1 and DIMM2)? I ask, because if I'm able to add in larger sticks, I would need to consider whether I need to move the existing 8GB modules to different channels or if I can just leave them where they are).
I'd be most appreciative if anyone would be willing to share their knowledge or thoughts on these.
Kind thanks!
https://preview.redd.it/jfq3jxessc9e1.png?width=1672&format=png&auto=webp&s=5ffaecf71e868507d1f6cd5b147476d8b79effae
