Cisco UCS B440 Note d'installation et d'entretien - Page 25
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S e n d d o c u m e n t c o m m e n t s t o u c s - d o c f e e d b a c k @ c i s c o . c o m
server needs at least one matched pair of DIMMs attached to CPU 1 or CPU 2. All four CPUs can boot
and run from a single DIMM pair. DIMM pairs must be identical, but one DIMM pair on a CPU can be
different from other pairs. DIMMs installed in slots for an absent CPU will not be recognized. For
optimal performance, distribute DIMMs evenly across all CPUs. DIMM connector latches are color
coded blue, yellow, black, and white, and Cisco recommends installing memory in that order. It is also
recommended to install memory evenly across the installed CPUs.
Figure 13
1
Channels
Each CPU has 8 channels, consisting of 4 matched pairs. Each channel pair is identified by a letter: A,
B, C, or D for each CPU. Each channel pair member is identified by numbers, either 1 or 0.
Figure 14
of their associated CPU. When installing DIMMs, you must add them in pairs in the configurations
shown in
Table 8
# of DIMMs to Install
2 (blue)
4 (blue, white )
8 (blue, white, yellow, and black)
OL-22475-01
Memory Slots Within the Blade Server
1
DIMMs for CPU 4
shows how channels are physically laid out on the blade server. The DIMM slots are to the left
Table
8:
Adding DIMMs to a CPU
Cisco UCS B440 High Performance Blade Server Installation and Service Note
1
Install DIMMs in Slot #
(A0, A1)
(A0, A1)–(C0, C1)
(A0, A1)–(C0, C1)–(B0, B1)–( D0, D1)
Memory and Performance
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