CONFIGURING the SERVER
Select DIMMs and Memory Mirroring
Select the memory configuration and whether or not you want the memory mirroring option. The available memory DIMMs and mirroring option are listed in Table 4.
NOTE: When memory mirroring is enabled, the memory subsystem simultaneously writes identical data to two channels. If a memory read from one of the channels returns incorrect data due to an uncorrectable memory error, the system automatically retrieves the data from the other channel. A transient or soft error in one channel does not affect the mirrored data, and operation continues unless there is a simultaneous error in exactly the same location on a DIMM and its mirrored DIMM. Memory mirroring reduces the amount of memory available to the operating system by 50% because only one of the two populated channels provides data.
Table 4 Available DDR3 DIMMs
Product ID (PID) | PID Description | Voltage | Ranks | ||
/DIMM | |||||
|
|
|
| ||
|
|
|
|
| |
DIMM Options1 |
|
|
|
| |
32 GB | 1.5/1.35 V2 | 4 | |||
16 GB | 1.5/1.35 V2 | 2 | |||
16 GB | 1.5 V | 2 | |||
8 | GB | 1.5/1.35 V2 | 2 | ||
8 | GB | 1.5/1.35 V2 | 2 | ||
8 | GB | 1.5 V | 2 | ||
4 | GB | 1.5/1.35 V2 | 1 | ||
4 | GB | 1.35 V | 1 | ||
4 | GB | 1.35 V | 2 | ||
Memory Mirroring Option |
|
| |||
Memory mirroring option |
|
|
Notes . . .
1.
2.Dual voltage DIMM (operates at 1.5 V with BIOS is set for memory performance mode (default), or 1.35 V when BIOS is set for
3.No longer shipping as of November, 2013
Cisco UCS Cisco UCS C220 M3 | 17 |