General Memory Module Installation Guidelines; Sample Memory Configurations - Dell PowerEdge R230 Owner's Manual

channel 1: memory sockets A2 and A4
The following table shows the memory populations and operating frequencies for the supported
configurations:
Table 11. Memory populations and operating frequencies for the supported configurations
Memory Memory modules
module type populated per
channel
ECC UDIMM 1
2

General memory module installation guidelines

Your system supports Flexible Memory Configuration, enabling the system to be configured and run in
any valid chipset architectural configuration. The following are the recommended guidelines for installing
memory modules:
• x4 and x8 DRAM-based DIMMs can be mixed.
• Up to two dual- or single-rank ECC UDIMMs can be populated per channel.
• Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to A4
are available.
• Populate all sockets with white release levers first, and then all the sockets with black release levers.
• When mixing memory modules with different capacities, populate the sockets with memory modules
with the highest capacity first. For example, if you want to mix 4 GB and 8 GB DIMMs, populate 8 GB
DIMMs in the sockets with white release levers and 4 GB DIMMs in the sockets with black release
levers.
• Memory modules of different capacities can be mixed provided other memory population rules are
followed (for example, 4 GB and 8 GB memory modules can be mixed).
• Mixing of more than two DIMM capacities in a system is not supported.
• Populate two DIMMs per processor (one DIMM per channel) at a time to maximize performance.

Sample memory configurations

The following table shows sample memory configurations for a single processor configuration.
NOTE: 1R and 2R in the following table indicate single, and dual-rank memory modules
respectively.
Table 12. Memory configurations—single processor
Populated Memory
system module size
capacity (in (in GB)
GB)
4 4
54
Operating frequency (in
MT/s)
1.2 V
2133, 1866, 1600
2133, 1866, 1600
Number of Memory module rank,
memory organization, and
modules frequency
1R, x8, 2133 MT/s,
1
Maximum memory module ranks
per channel
Dual rank or single rank
Dual rank or single rank
memory module slot population
A1