Bull Cedoc NovaScale R423, Installation And User Manual

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Chapter 5: Advanced Serverboard Setup
5-9
Memory Support
The NovaScale R423 serverboard supports up to 128 GB fully buffered (FBD) ECC
DDR2 800/667/533 in 16 DIMM slots (four channels, two branches). Both 1.5V and
1.8V memory are supported. Single channel memory, two-way interleaved memory
and four-way interleaved memory schemes are all supported. Using four-way inter-
leaved memory will result in the best performance. Please use memory modules of
the same type, speed, timing and same on a serverboard. Note: See the following
table for memory installation.
Installing Memory Modules
Insert the desired number of Fully Buffered DDR2 modules into the memory
slots, starting with DIMM #1A. To enhance memory performance, install pairs
of memory modules of the same type and of the same, beginning with DIMM
#1A and DIMM #2A, then DIMM #3A and DIMM #4A, etc. (see Memory Con-
fi guration Table below).
Insert each DIMM module vertically into its slot. Pay attention to the notch
along the bottom of the module to avoid installing incorrectly (see Figure 5-3).
1.
2.
!
CAUTION! Exercise extreme care when installing or removing DIMM
modules to prevent any possible damage.
5-6 Installing Memory
Memory Configuration Chart
Branch 0 Branch 1
Number of
DIMMs Bank 1
(Channel 0) Bank 2
(Channel 1) Bank 3
(Channel 2) Bank 4
(Channel 3)
2 DIMMs 1A --- --- --- 2A --- --- --- --- --- --- --- --- --- --- ---
4 DIMMs 1A --- --- --- 2A --- --- --- 3A --- --- --- 4A --- --- ---
8 DIMMs 1A 1B --- --- 2A 2B --- --- 3A 3B --- --- 4A 4B --- ---
12 DIMMs 1A 1B 1C --- 2A 2B 2C --- 3A 3B 3C --- 4A 4B 4C ---
16 DIMMs 1A 1B 1C 1D 2A 2B 2C 2D 3A 3B 3C 3D 4A 4B 4C 4D
Notes: i. DIMM slot# specified = DIMM slot to be populated; “---“ = DIMM slot not to
be populated. ii. Both FBD 533 MHz, 667MHz and 800MHz DIMMs are supported,
however, you need to use the memory modules of the same speed and type.
iii. Interleaved memory is supported when pairs of DIMM modules are installed. For
optimal memory performance, please install pairs of memory modules in both Branch
0 and Branch 1.