All DIMMs installed in the server must be identical (same capacity, same rank classification).
Each DIMM includes a printed label identifying its rank classification (examples below). Use these rank classification labels to identify the architecture of the DIMMs installed in the server, as well as any replacment or upgrade DIMMs you intend to install.
Tip - To determine the rank classification of installed DIMMs, remove the server top cover and read the labels on the DIMMs. For top cover removal instructions, see Preparing for Service.
The following table identifies the corresponding rank classification labels on supported DIMMs.
Table 28 DIMM Rank Classifications
Note - DIMMs installed must have identical architecture. For more information, see DIMM Population Rules.