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Memory and Performance
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
Supported DIMMs
Table 5
Table 5
Cisco Product ID
A02-M308GB1-2
A02-M316GB1-2
A02-M308GB1-2-L
A02-M316GB1-2-L
UCS-MR-2X041RX-B
1. Low voltage DIMMs require Cisco UCS Manager version 1.2(1) or later, and the related BIOS package.
Table 6
Cisco Product ID
A02-M308GB1-2
A02-M308GB2-2-L
A02-M316GB1-2
A02-M308GB1-2-L
A02-M316GB1-2-L
UCS-MR-2X041RX-B
UCS-MR-2X082RX-B
1. 4 GB single Rank low voltage DIMMs require Cisco UCS Manager version 1.4(1) or later, and the related BIOS package.
2.
Note
The following guidelines must be observed when making memory changes:
•
•
•
•
Cisco UCS B250 Extended Memory Blade Server Installation and Service Note
24
and
Table 6
list the DIMMs that Cisco Systems makes available for use with this blade server:
Cisco Systems Supported DIMMs for M1 Series
Description
Two DIMMs, each 4GB dual–rank DDR3–1333
Two DIMMs, each 8GB dual–rank DDR3–1333
Two DIMMs, each 4 GB DDR3-1333 MHz Low Voltage
Two DIMMs, each 8 GB DDR3-1333 MHz Low Voltage
Two DIMMs, each 4 GB DDR3-1333 MHz Low Voltage
Cisco Systems Supported DIMMs for M2 Series
Description
Two DIMMs, each 4 GB dual–rank DDR3–1333 MHz
Two DIMMs, each 4 GB single–rank DDR3–1333 MHz Low Voltage
Two DIMMs, each 8 GB dual–rank DDR3–1333 MHz
Two DIMMs, each 4 GB DDR3-1333 MHz Low Voltage
Two DIMMs, each 8 GB DDR3-1333 MHz Low Voltage
Two DIMMs, each 4 GB single-rank DDR3-1333 MHz Low Voltage
PC3-10600
Two DIMMs, each 8 GB dual-rank DDR3-1333 MHz Low Voltage
PC3-10600
Low voltage DIMMs require Cisco UCS Manager version 1.2(1) or later, and the related BIOS package.
Only Cisco memory is supported. Third party DIMMs are not tested or supported.
If the system has two CPUs, both CPU DIMM slots should be populated in an identical manner.
The B250 uses Cisco's extended memory technology, where writes happen simultaneously to both
DIMMs in the pair, so they must be identical. Therefore, B250 server memory is always sold as a
correctly matched pair with identical manufacturer, type, speed, and size, intended to be installed
together in the two paired banks of a single UCS Server memory channel. Mixing of unpaired
DIMMs (even with other DIMMs sold under the same product ID) will result in a memory errors
should a mismatch occur. When installing DIMMs in a B250, you must add matched pairs to the
channel slots in the order shown in
a channel, or a configuration of 6 DIMMs per channel.
Carefully match CPU and DIMM speed. If the CPU and DIMM speeds do not match, the system
runs at the slower of the two speeds.
Table
7. This server does not support odd numbers of DIMMs in
1
1
1
2
2
OL-22474-03
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