4-50 Sun Fire V20z and Sun Fire V40z Servers—User Guide • March 2005
■ Each CPU can support two banks of DIMMs. While each bank must contain a pair
of matching DIMMs, the size and vendor of the DIMMs between bank 0 and
bank 1 do not have to match.
■ For example, TABLE 4-1 shows some valid sample configurations for CPU0. In
each example, DIMM 0 and DIMM 1 match in size (and vendor), but they do
not have to match DIMM 2 and DIMM 3. DIMM 2 and DIMM 3 must match
within their bank, but they do not have to match DIMM 0 and DIMM 1.
■ The sample configurations in TABLE 4-2 are not valid because in each case, at
least one of the banks contains mismatched DIMM pairs.
TABLE 4-1 Sample of Valid DIMM Configurations
CPU 0 BANK 0 BANK 1
Example 1 DIMM 0 = 512, DIMM 1 = 512 DIMM 2 = 1GB, DIMM 3 = 1GB
Example 2 DIMM 0 = 1GB, DIMM 1 = 1GB DIMM 2 = 1GB, DIMM 3 = 1GB
Example 3 DIMM 0 = 1GB, DIMM 1 = 1GB DIMM 2 = 512, DIMM 3 = 512
Example 4 DIMM 0 = 2GB, DIMM 1 = 2GB DIMM 2 = 512, DIMM 3 = 512
TABLE 4-2 Sample of Non-Valid DIMM Configurations
CPU 0 BANK 0 BANK 1
Example 1 DIMM 0 = 512, DIMM 1 = 1GB DIMM 2 = 512, DIMM 3 = 512
Example 2 DIMM 0 = 1GB, DIMM 1 = 1GB DIMM 2 = 512, DIMM 3 = 2GB
Example 3 DIMM 0 = 2GB, DIMM 1 = 2GB DIMM 2 = 512, DIMM 3 = 1GB
Example 4 DIMM 0 = 512, DIMM 1 = 1GB DIMM 2 = 512, DIMM 3 = 1GB
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