AC450NX Rack Server System Product Guide
240

Installing DIMMs

CAUTION
DIMM devices with gold contacts should not be installed in DIMM sockets
with tin-lead contacts or vice versa. Mixing dissimilar metal contacts types
has been shown to result in unreliable memory operation.
To avoid potential memory problems, use only DIMMs from JEDEC-compatible manufacturers
that have been tested for compatibility with the memory module. Contact your sales representative
or dealer for a list of approved DIMMs.
See Figures 19-5 and 19-6.
1. Observe the precautions on page 115, “Safety Guidelines.”
2. Remove the top and side covers as described in Chapter 12, “Server Covers:
Removing/Reinstalling.”
3. Remove the memory module as described in Chapter 13, "Server Components:
Removing/Reinstalling."
4. Being careful not to touch the components on the memory module, place the module
DIMM-side up on a nonconductive, static-free surface.
5. Hold the DIMM only by the edges as you remove the DIMM from the antistatic package.
6. Beginning with bank A (Figure 19-5), socket J1, orient the DIMM so that the two notches in
the bottom edge align with the keyed socket.
OM07320
Figure 19-5. DIMM Orientation