IBM x3100 User Manual page 32

To install a DIMM, complete the following steps:
1. Locate the DIMM connectors on the system board. Determine the connectors
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System x3100 Type 4348: User's Guide
into which you will install the DIMMs.
DIMM 4 LED
DIMM 1
DIMM 2
DIMM 3
DIMM 4
DIMM 1 LED
DIMM 2 LED
DIMM 3 LED