Sun Microsystems Blade X6450, Service Manual

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3-24 Sun Blade X6450 Server Module Service Manual • May 2009
3.4.3 Replacing DIMMs (CRU)
This section describes how to replace DIMMs. It provides the rules for populating
DIMM slots.
Before You Begin
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For troubleshooting information, see Section 3.3, “Troubleshooting Server Issues”
on page 3-17 .
3.4.3.1 DIMM Population Rules
The DIMM population rules for the server module are listed here:
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The server module can support a maximum of 24 DIMMs.
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DIMM slots are paired.
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DIMMs must be installed in pairs.
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The slots for the first two pairs are blue; all others are black. For example, pairs A0
and B0 are blue, and pairs C0 and D0 are blue.
■
The two DIMMs within each pair must be identical (same manufacturer, size, and
speed).
TABLE 3-8
shows the population rules based on the number of DIMMs.
FIGURE 3-9
shows the DIMM numbering and positions
TABLE 3-8
DIMM Slots and Locations
Number
of DIMMs
Slot
Location Number
of DIMMs
Slot
Location
2 A0, B0 14 All of the above, plus: A3, B3
4 All of the above, plus: C0, D0 16 All of the above, plus: C3, D3
6 All of the above, plus: A1, B1 18 All of the above, plus: A4, B4
8 All of the above, plus: C1, D1 20 All of the above, plus: C4, D4
10 All of the above, plus: A2, B2 22 All of the above, plus: A5, B5
12 All of the above, plus: C2, D2 24 All of the above, plus: C5, D5