Lenovo ThinkStation P920 Tower Workstation - Manual (Page 117)

Memory module
Attention: Do not open your computer or attempt any repair before reading and understanding the “Read
this first: Important safety information” on page iii.
Your computer has 16 slots for installing or replacing DDR4 DIMMs that provide up to a maximum of 4096
GB system memory. When installing or replacing a memory module, use the following guidelines:
• Use any of DDR4 ECC RDIMMs or DDR4 ECC 3DS RDIMMs for your computer. Do not install the RDIMMs
or 3DS RDIMMs into the same computer.
• Use 8 GB, 16 GB, 32 GB, or 64 GB RDIMMs in any combination up to a maximum of 1024 GB.
• Use 256 GB 3DS RDIMM up to a maximum of 4096 GB.
Memory module installation rules
Install memory modules in the alphabetic order as shown.
Figure 89. Memory module installation order for computers with one microprocessor
Figure 90. Memory module installation order for computers with two microprocessors
Chapter 7 . Hardware removal and installation 105