Hi Matty
From Lenovo Japan
Thank you for your participating in our forum site.
When doing any kind of Parts confirmation the
quickest way is to use the below site and simply put in your serial #
and it will direct you to a filtered and customized dashboard
just for your unit and look through the different tab for Documents.
https://datacentersupport.lenovo.com
http://thinksystem.lenovofiles.com/help/index.jsp?topic=%2F7X01%2Fpdf_files.html
From the above link
This is the statement from Lenovo
Answer: Note: It is recommended to install DIMMs with the same rank in each channel.
ThinkSystem rack servers > ThinkSystem SR630 Types 7X01, 7X02 > Hardware replacement procedures > DIMM replacement
DIMM installation rules
DIMMs must be installed in a specific order based on the memory configuration that you implement on your server.
Your server has 24 DIMM slots and it has the following features:
Each slot supports 8 GB, 16 GB, and 32 GB DDR4 RDIMMs with Error Checking and Correcting (ECC) technology.
Each slot supports 64 GB DDR4 LRDIMMs with ECC technology.
Each slot supports 128 GB DDR4 3DS RDIMMs with ECC technology.
Your server supports up to 12 DIMMs when one processor is installed, and up to 24 DIMMs when two processors are installed.
The minimum system memory is 8 GB (only one processor installed and only one 8 GB RDIMM installed in the CPU1 DIMM5 slot).
The maximum system memory is as follows:
768 GB using RDIMMs (two processors installed and one 32 GB RDIMM installed in each of the 24 DIMM slots)
1.5 TB using LRDIMMs (two processors installed and one 64 GB LRDIMM installed in each of the 24 DIMM slots)
3 TB using 3DS RDIMMs (two processors installed and one 128 GB 3DS RDIMM installed in each of the 24 DIMM slots)
For a list of supported DIMM options, see:the Lenovo ServerProven website
Before installing a DIMM, ensure that all DIMMs to be installed must be the same type. Your server supports the following types of DIMMs:
DDR4 RDIMM with ECC technology
DDR4 LRDIMM with ECC technology
DDR4 3DS RDIMM with ECC technology
Note: It is recommended to install DIMMs with the same rank in each channel.
Hope this info helps.
Thank you for using this site.
Lenovo - Japan