Cisco UCS B440 M2 Blade Server
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SUPPLEMENTAL MATERIAL
DIMM and CPU Layout
Each CPU controls four memory channels, as follows (refer to
Figure 3 on page 10
):
■
Channels A, B, C, and D
— Bank 0: A0 (blue DIMM slot), C0 (white DIMM slot), B0 (yellow DIMM slot), D0 (black
DIMM slot)
— Bank 1: A1 (blue DIMM slot), C1 (white DIMM slot), B1 (yellow DIMM slot), D1 (black
DIMM slot)
The DIMM and CPU physical layout is shown in
Figure 6
. Each CPU is located to the right of the DIMMs it
controls.
Figure 6
DIMM and CPU Layout
Memory Population Recommendations
See
Table 5 on page 11
. Note that DIMMs in slots of the same color must be electrically paired with each
other, and should be populated with identically matched DIMMs that were ordered as a pair. Do not swap a
paired DIMM with a DIMM that is not identical in manufacturer part number.
When considering the memory configuration of your server, you should observe the following:
■
There is only one DIMM slot (one bank) in each of the DDR channels. Therefore, all DIMM
pairs in a B440 M2 server must be identical.
■
Your selected CPU(s) can have some effect on performance. All CPUs in the server must be
of the same type.
■
Performance degradation can result from the following:
— Mixing DIMM sizes and densities within a pair is not allowed and both DIMMs in the
pair will be logically removed from the memory array
NOTE:
DIMMs installed in slots for an absent CPU are not recognized.
