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
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Cisco UCS B250 Extended Memory Blade Server Installation and Service Note
OL-22474-03
Memory and Performance
Figure 12
Installing DIMMs in the Blade Server
Step 2
Press the DIMM into its slot evenly on both ends until it clicks into place, refer to callout 2 in
Figure 12
.
The DIMM connector latches will snap into place.
Step 3
Press the DIMM connector latches inward slightly to seat them fully. Refer to callout 3 in
Figure 12
.
Memory and Performance
This section describes the type of memory that the extended memory blade server requires and its effect
on performance. The following topics are covered:
•
Supported DIMMs, page 24
•
Low-Voltage DIMM Considerations, page 25
•
Memory Arrangement, page 26
•
Memory Performance, page 28
•
Memory Mirroring and RAS, page 30
Modern processors are designed to support several generations of memory technology. Cisco's Extended
Memory Technology allows us to replace high-density DIMMs with multiple lower-density DIMMs in
a way that is transparent to the processor and to applications. In some configurations, we are emulating
DIMMs that are not available, such as making four 8-GB DIMMs appear to be a single 32-GB DIMM.
In other cases we can emulate high cost-per-bit DIMMs with multiple low cost-per-bit DIMMs; for
example, making four 4 GB DIMMs emulate a 16 GB DIMM.
