General Memory Module Installation Guidelines; Mode-Specific Guidelines - Dell DR4300 Owner's Manual

Table 30. Memory population
DIMM Type DIMMs
Populated/
Channel
RDIMM 1
2
3
GUID-770A902D-9E4F-440E-A77D-B6ABC3308396

General memory module installation guidelines

NOTE: Memory configurations that fail to observe these guidelines can prevent your system from
booting, stop responding during memory configuration, or operating with reduced memory.
The 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 memory modules can be mixed. For more information, see the Mode-specific
guidelines section.
• Up to three dual- or single-rank RDIMMs can be populated per channel.
• If memory modules with different speeds are installed, they will operate at the speed of the slowest
installed memory module(s) or slower depending on system DIMM configuration.
• Populate memory module sockets only if a processor is installed. For single-processor systems,
sockets A1 to A12 are available. For dual-processor systems, sockets A1 to A12 and sockets B1 to B12
are available.
• Populate all the sockets with white release tabs first, followed by the black release tabs, and then the
green release tabs.
• When mixing memory modules with different capacities, populate the sockets with memory modules
with highest capacity first. For example, if you want to mix 4 GB and 8 GB memory modules, populate
8 GB memory modules in the sockets with white release tabs and 4 GB memory modules in the
sockets with black release tabs.
• In a dual-processor configuration, the memory configuration for each processor should be identical.
For example, if you populate socket A1 for processor 1, then populate socket B1 for processor 2, and
so on.
• 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 memory module capacities in a system is not supported.
• Populate four memory modules per processor (one DIMM per channel) at a time to maximize
performance.
GUID-30ABB8BF-8DD5-4139-B67F-82BC5C5BE1F5

Mode-specific guidelines

Four memory channels are allocated to each processor. The allowable configurations depend on the
memory mode selected.
GUID-984F2B7A-CDB4-48AA-8EEA-9FB6EAF2F789
Operating Frequency
Voltage (in MT/s)
2133, 1866, 1600,
1333
1.2 V 2133, 1866, 1600,
1333
1866, 1600, 1333
Maximum DIMM Rank/
Channel
Dual rank or single rank
Dual rank or single rank
Dual rank or single rank
77