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 B440 High Performance Blade Server Installation and Service Note
OL-22475-01
Memory and Performance
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.
Supported DIMMs
Table 6
and
Table 7
list the type of DIMMs that Cisco Systems makes available for use with this blade
server:
Caution
Server memory is always sold as a matched DIMM pair intended to be installed together in a single UCS
Server memory bank. Un-pairing this set and mixing with other non-matched DIMMs can potentially
result in memory errors.
Cisco does not support third-party memory DIMMs, and in some cases their use may irreparably damage
the server and require an RMA and down time.
Memory Arrangement
The Cisco UCS B440 high-performance blade server contains 32 slots for installing DIMMs—8 for each
CPU. Each CPU has 8 DIMM slots and DDR channels, with 4 pairs of DIMMs operating in lockstep (see
Figure 13
) so you must install additional DIMMs in pairs, as laid out in
Table 8 on page 25
. This blade
Table 6
Cisco Systems Supported DIMMs (M1 Models)
Product ID
Description
A02-M308GB3-2
Two DIMMs, each 4 GB DDR3–1066 MHz (Low Voltage supported)
A02-M316GB3-2
Two DIMMs, each 8GB DDR3–1066 MHz (Low Voltage supported)
A02-M332GB3-2-L
Two DIMMs, each 16 GB DDR3–1066 MHz (Low Voltage supported)
UCS-MR-2X041RX-C Two DIMMs, each 4 GB DDR3–1333 MHz (Low Voltage supported)
Table 7
Cisco Systems Supported DIMMs (M2 Models)
Product ID
Description
A02-M308GB3-2
Two DIMMs, each 4 GB DDR3–1066 MHz (Low Voltage supported)
A02-M316GB3-2
Two DIMMs, each 8 GB DDR3–1066 MHz (Low Voltage supported)
A02-M332GB3-2-L
Two DIMMs, each 16 GB DDR3–1066 MHz (Low Voltage supported)
A02-M308GD5-2
Two DIMMs, each 4 GB DDR3–1333 MHz
A02-M316GD5-2
Two DIMMs, each 8 GB DDR3–1333 MHz
UCS-MR-2X324RX-C Two DIMMs, each 32 GB DDR3–1333 MHz (Low Voltage supported)
1
1.
Capability catalog 2.0(1m)T or later is required.
