Table of Contents
Advertisement
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
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
server:
Table 6
Product ID
A02-M308GB3-2
A02-M316GB3-2
A02-M332GB3-2-L
UCS-MR-2X041RX-C Two DIMMs, each 4 GB DDR3–1333 MHz (Low Voltage supported)
Table 7
Product ID
A02-M308GB3-2
A02-M316GB3-2
A02-M332GB3-2-L
A02-M308GD5-2
A02-M316GD5-2
UCS-MR-2X324RX-C Two DIMMs, each 32 GB DDR3–1333 MHz (Low Voltage supported)
1. Capability catalog 2.0(1m)T or later is required.
Server memory is always sold as a matched DIMM pair intended to be installed together in a single UCS
Caution
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
Cisco UCS B440 High Performance Blade Server Installation and Service Note
24
and
Table 7
list the type of DIMMs that Cisco Systems makes available for use with this blade
Cisco Systems Supported DIMMs (M1 Models)
Description
Two DIMMs, each 4 GB DDR3–1066 MHz (Low Voltage supported)
Two DIMMs, each 8GB DDR3–1066 MHz (Low Voltage supported)
Two DIMMs, each 16 GB DDR3–1066 MHz (Low Voltage supported)
Cisco Systems Supported DIMMs (M2 Models)
Description
Two DIMMs, each 4 GB DDR3–1066 MHz (Low Voltage supported)
Two DIMMs, each 8 GB DDR3–1066 MHz (Low Voltage supported)
Two DIMMs, each 16 GB DDR3–1066 MHz (Low Voltage supported)
Two DIMMs, each 4 GB DDR3–1333 MHz
Two DIMMs, each 8 GB DDR3–1333 MHz
13) so you must install additional DIMMs in pairs, as laid out in
1
Table 8 on page
25. This blade
OL-22475-01
Advertisement
Table of Contents
