Table 3. Dual-channel mode with single-rank and double-rank DIMMsFirst pair Second pair RemarksDIMM 1 DIMM 2 DIMM 3 DIMM 4Single-rank Single-rank Single-rank Single-rankSingle-rank Single-rank Double-rank Double-rank Thisconfiguration isthe second-bestchoice.Double-rank Double-rank Single-rank Single-rank Thisconfiguration isthe best choice.Double-rank Double-rank Double-rank Double-rankThe following table shows the sequence in which DIMMs must be installed in theserver.Table 4. DIMM installation sequenceNumber of DIMMs Installation sequence (connectors)1 12 (interleaved configuration) 1, 33 The use of three DIMMs is not supported,4 (interleaved configuration) 1, 3, 2, 4v The amount of usable memory will be reduced depending on the systemconfiguration. A certain amount of memory must be reserved for systemresources. To view the total amount of installed memory and the amount ofconfigured memory, run the Configuration/Setup Utility program and selectSystem Summary from the menu. For additional information, see Chapter 3,“Configuring the server,” on page 57.v When you restart the server after you add or remove a DIMM, the serverdisplays a message that the memory configuration has changed.28 System x3200 M2 Types 4367 and 4368: User’s Guide
