NEC Express5800/120Rf-2, User Manual

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4-10 Upgrading Your System
12. Reinstall the top cover on the system chassis. See Top Cover Installation
found earlier in this chapter.
13.
Plug in the system power cord(s), and turn on the system.
14.
Run the BIOS Setup to restore the configuration settings to the real-time
clock.
15.
Reinstall the server into the rack.
DIMMs
The system board contains six DIMM sockets (Figure 4-7). Each socket can
hold a single 72-bit DIMM module with 128MB, 256MB, 512MB, or 1GB of
memory. When all six sockets are populated, the system board supports a
maximum of 6GB of memory with 1GB DIMMs.
Memory is partitioned as three banks of SDRAM that must be populated in
pairs, each providing 72 bits of buffered two-way interleaved memory (64-bit
main memory plus ECC). DIMMs will always be installed in sockets 1A and 1B
(Figure 4-7). When you install additional DIMMs, you must start with the first
empty socket next to the last DIMMs already installed. When you remove
DIMMs, you must start with the highest numbered occupied DIMM sockets on
the system board.
1A
1B
2A
3A
2B
3B
Note:
DIMMs are always added in pairs in the
ascending order of DIMM socket numbers.
1A DIMM #1-A
1B DIMM #1-B
DIMM Group Bank #1
2A DIMM #2-A
2B DIMM #2-B
DIMM Group Bank #2
3A DIMM #3-A
3B DIMM #3-B
DIMM Group Bank #3
Figure 4-7. DIMM Locations on the System Board