Cisco UCS B420 M3 Note d'installation et d'entretien - Page 23
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Memory Arrangement
The Cisco UCS B420 high-performance blade server contains 48 slots for installing DIMMs—12 for each CPU. Each CPU has 12
DIMM slots spread over 4 channels. This blade server needs at least one DIMM attached to all populated CPUs. 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, black, and white, and the DIMMs must be installed in that order.
Figure 17: Memory Slots Within the Blade Server
1
DIMMs for CPU 1
DIMMs for CPU 2
2
Channels
Each CPU has 4 channels, consisting of 3 DIMMs. Each channel is identified by a letter. Each channel member is identified by
numbers, 0, 1 or 2.
The DIMM slots are contiguous to their associated CPU. When installing DIMMs, you must add them in the configurations shown
in the following table.
3
DIMMs for CPU 3
DIMMs for CPU 4
4
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