Cisco UCS C240 M3 High-Density Rack Server (Small Form Factor Disk Drive Model)
SUPPLEMENTAL MATERIAL
53
Low-Voltage DIMM Considerations
The C240 M3 server can be ordered with dual-voltage (1.35 V) DIMMs. Note the following considerations: 
■ Low-voltage DIMMs within the server must have the identical manufacturer, type, speed, 
and size. 
■ Low-voltage DIMMs and standard-voltage DIMMs can be mixed in the same server. Note that 
this causes the system BIOS to default to standard-voltage operation (Performance Mode). 
That is, the server cannot operate in Power Saving Mode unless all DIMMs are low-voltage 
DIMMs.
■ CPUs that have a maximum memory frequency less than 1333 MHz support low-voltage 
DIMMs operating in Power Saving Mode only, and do not support Performance Mode.
RAID Summary
The C240 M3 SFF server can be ordered with a 16-drive backplane without a SAS expander or with a 24-drive 
backplane with a SAS expander.
■ ROM5 and ROM 55 embedded RAID upgrade options support up to 8 drives with the 16-drive 
backplane with no SAS expander and are not supported for the 24-drive backplane with the 
SAS expander.
■ Mezzanine cards (UCSC-RAID-11-C240 and UCSC-RAID-MZ-240) support up to 8 drives for the 
16-drive backplane with no SAS expander, and up to 16 drives for the 24-drive backplane 
with the SAS expander
■ 9266-8i and 9266CV-8i PCIe cards support up to 8 drives each for the 16-drive backplane with 
no SAS expander, and up to 24 drives for 24-drive backplane with SAS expander
7 x 16 GB 7 112 GB 7 x 16 GB 7 112 GB 224 GB
8 x 16 GB 8 128 GB 8 x 16 GB 8 128 GB 256 GB
9 x 16 GB 9 144 GB 9 x 16 GB 9 144 GB 288 GB
10 x 16 GB 10 160 GB 10 x 16 GB 10 160 GB 320 GB
11 x 16 GB 11 176 GB 11 x 16 GB 11 176 GB 352 GB
12 x 16 GB 12 192 GB 12 x 16 GB 12 192 GB 384 GB
a. Configurations for optimum memory performance are highlighted in yellow.
NOTE:  If you do not select a mezzanine card, a plug-in PCIe RAID card, or one of the 
embedded RAID upgrade options, you will have an embedded SATA-only RAID 
controller that supports up to four SATA-only drives (RAID 0, 1, 10).
Table 28  Supported DIMM Configurations (continued) 
a
CPU 1 DIMMs
Tota l 
DIMMs for 
CPU 1
CPU 1 
Capacity
CPU 2 DIMMs
Tot al 
DIMMs for 
CPU 2
CPU 2 
Capacity
Total 
Capacity for 
2 CPUs