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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
The memory in the upper right cannot communicate with the memory in lower left, unless both CPUs
Note
are present.
Figure 15
Figure 15
Channel A
Channel B
Channel C
DIMMs can be used in the blade server in either a one DIMM per Channel (1DPC) configuration or in
a two DIMMs per Channel (2DPC) configuration.
Each CPU in a Cisco UCS B200 blade server supports 3 channels of 2 memory slots each. In a 1 DPC
configuration, DIMMs are in slot 1 only. In a 2 DPC configuration, DIMMs are in both slot 1 and slot 2.
Table 7
work if problems arise moving them to the preferred arrangement should help.
Table 7
DIMMs per CPU
1
2
3
4
5
6
Memory Performance
When considering the memory configuration of your blade server, there are several things you need to
consider. For example:
•
•
OL-22473-02
shows a logical view of the DIMMs and Channels
Logical Representation of Logical DIMMs and Channels
CPU 1
shows the preferred order for installing upgrade DIMMs, and while other configurations may
Preferred DIMM Population Order
CPU 1 installed slots
A1
A1, B1
A1, B1, C1
A1, A2, B1, C1
A1, A2, B1, B2, C1
A1, A2, B1, B2, C1, C2
DIMMs within the blade server should all be the same type. This goes for both speed and size. Do
not mix different sized DIMMs or DIMMs with different clock rates in the same blade server. Doing
so will cause a significant loss of performance.
Your selected CPU(s) can have some affect on performance.
Channel D
CPU 2
Channel E
Channel F
CPU 2 installed slots
D1
D1, E1,
D1, E1, F1
D1, D2, E1, F1
D1, D2, E1, E2, F1
D1, D2, E1, E2, F1, F2
Cisco UCS B200 Blade Server Installation and Service Note
Removing a Blade Server Cover
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