Add-on modules / Upgrading
16 A26361-D1818-Z120-1-7619, edition 1
Installing the Memory
Before attempting to install any memory, make sure that the memory you have is compatible with the
motherboard as well as the processor.
The following diagram shows common types of DDR SDRAM modules:
Here are a few key points to note before installing memory into your mainboard D1818.
• Always install memory beginning with DIMM3 and DIMMM2.
• In order to access memory on CPU2; both processors must be installed.
• Configure memory symmetrically for each CPU for best performance.
• AMD OpteronTM processors support 64bit (non-interleaved) or 128bit (interleaved) memory
configurations (See chart).
• At least two Registered DDR SDRAM modules (DIMM3 and DIMM2) must be installed for the
system to turn on and POST (power on self test).
• 128MB, 256MB, 512MB, 1GB, 2GB and 4GB Registered PC2100/ PC2700/PC3200 DDR
SDRAM memory modules are supported.
• All installed memory will be automatically detected.
• The mainboard D1818 supports up to 32GB with two CPUs installed.
• Use only identical DIMMs for one channel.
• Memory must be installed in pairs of DIMMs (DIMM3 and DIMM2, DIMM1 and DIMM0,
DIMM7 and DIMM6, DIMM5 and DIMM4).
Following memory configurations are allowed
i
X indicates a populated CPU socket or a populated DIMM Slot.
CPU0 CPU1 DIMM3 DIMM2 DIMM1 DIMM0 DIMM7 DIMM6 DIMM 5 DIMM4
X X X
X X X X X
X X X X X X
X X X X X X X X X X
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