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Cisco UCS B250 Extended Memory Blade Server Installation and Service Note
OL-22474-03
Memory and Performance
Supported DIMMs
Table 5
and
Table 6
list the DIMMs that Cisco Systems makes available for use with this blade server:
Note
The following guidelines must be observed when making memory changes:
•
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
Table 7
. This server does not support odd numbers of DIMMs 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 5
Cisco Systems Supported DIMMs for M1 Series
Cisco Product ID
Description
A02-M308GB1-2
Two DIMMs, each 4GB dual–rank DDR3–1333
A02-M316GB1-2
Two DIMMs, each 8GB dual–rank DDR3–1333
A02-M308GB1-2-L
Two DIMMs, each 4 GB DDR3-1333 MHz Low Voltage
1
1.
Low voltage DIMMs require Cisco UCS Manager version 1.2(1) or later, and the related BIOS package.
A02-M316GB1-2-L
Two DIMMs, each 8 GB DDR3-1333 MHz Low Voltage
1
UCS-MR-2X041RX-B
Two DIMMs, each 4 GB DDR3-1333 MHz Low Voltage
Table 6
Cisco Systems Supported DIMMs for M2 Series
Cisco Product ID
Description
A02-M308GB1-2
Two DIMMs, each 4 GB dual–rank DDR3–1333 MHz
A02-M308GB2-2-L
Two DIMMs, each 4 GB single–rank DDR3–1333 MHz Low Voltage
1
1.
4 GB single Rank low voltage DIMMs require Cisco UCS Manager version 1.4(1) or later, and the related BIOS package.
A02-M316GB1-2
Two DIMMs, each 8 GB dual–rank DDR3–1333 MHz
A02-M308GB1-2-L
Two DIMMs, each 4 GB DDR3-1333 MHz Low Voltage
2
2.
Low voltage DIMMs require Cisco UCS Manager version 1.2(1) or later, and the related BIOS package.
A02-M316GB1-2-L
Two DIMMs, each 8 GB DDR3-1333 MHz Low Voltage
2
UCS-MR-2X041RX-B
Two DIMMs, each 4 GB single-rank DDR3-1333 MHz Low Voltage
PC3-10600
UCS-MR-2X082RX-B
Two DIMMs, each 8 GB dual-rank DDR3-1333 MHz Low Voltage
PC3-10600
