User`s guide

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3.2.2 Memory
The system mainboard uses Dual Inline Memory Modules (DIMM). Two pair's banks are available;
each bank supports one CPU with Hyper Transport Technology. The memory DIMMs accommodates Registered
ECC (400/533/667) SDRAM DIMM and Double Data Rate Memory (DDR2) memory modules in 128MB,
256MB, 512MB, 1GB, and 2GB, 4GB combinations. Total memory size for one CPU is up to 32GB.
CAUTION
The system mainboard has strict memory type and timing requirements.
Before you purchase DDR (Double Data Rate) memory for using in the system mainboard, you should
contact your local reseller for a recommend list of system memory that has been validated on this
system. It only supports registered memory, not supports unbuffered type memory.
CAUTION
To take advantage of the 128-bit interface, you must install DIMMs in pairs of two. DIMM0 and DIMM1
are paired; DIMM2 and DIMM3 are paired; DIMM4 and DIMM5 are paired; and slots DIMM6 and DIMM7
are paired. If you are only installing two DIMMs into a Memory Bank, it is recommended that you install
them in slots DIMM6 and DIMM7 to get the full bandwidth.
NOTE
For optimal dual-channel DDR operation, installing DIMMs in pair is highly recommended. For two DIMMs
per CPU, install them far from the CPU. For four or more DIMMs per CPU, install them same method to
the CPU.
Memory Configuration Chart
(Note: X indicates a populated DIMM Slot, The chart below does not included all the configuration)
CPU 0 CPU 1
DIMM0 DIMM1 DIMM2 DIMM3 DIMM4 DIMM5 DIMM6 DIMM7 DIMM0 DIMM1 DIMM2 DIMM3 DIMM4 DIMM5 DIMM6 DIMM7
xx
xxxx
x x x x x x
x x x x x x x x
xx x x
x x x x x x x x
x x x x x x x x x x x x
128bit memory support
x x x x x x x x x x x x x x x x