NEC Express5800/120Ra-1 User's Guide Page 94

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4-16 Upgrading Your System
DIMMs
The system board contains four DIMM sockets labeled 1 through 4
(Figure 4-14). Each socket can hold a single 72-bit DIMM module with 64MB,
128MB, 256MB, 512MB, or 1GB of memory. When all four sockets are
populated, the system board supports a maximum of 4 GB of memory with 1GB
DIMMs. A DIMM will always be installed in socket 1. When you install
additional DIMMs, you must start with the first empty socket next to the
DIMMs already installed. When you remove DIMMs, you must start with the
highest number occupied DIMM socket on the system board.
DIMM 1
DIMM 2
DIMM 3
DIMM 4
Figure 4-14. DIMM Locations
Installing DIMMs
1. Remove the system front bezel and rear top cover as described earlier in this
chapter.
2. Ensure the server is powered down and the AC cable is disconnected.
!
CAUTION
Observe static precautions. Use an antistatic wrist strap.
Hold DIMMs only by their edges.
3. Gently open the plastic ejector levers on the socket by pushing them outward
from the socket. See Figure 4-15
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