General Memory Module Installation Guidelines - Dell PowerEdge T630 Owner's Manual

Memory channels are organized as follows:
Table 28. Memory channels
Process Channel 0
or
Process Slots A1, A5, and A9
or 1
Process Slots B1, B5, and B9
or 2
The following table shows the memory populations and operating frequencies for the supported
configurations:
Table 29. Memory population
DIMM DIMMs
Type Populated/
Channel
RDIMM 1
2
3
LRDIMM 1
2
3

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:
• RDIMMs and LRDIMMs must not be mixed.
• 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.
• Up to three LRDIMMs can be populated per channel regardless of rank count.
• 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
Channel 1
Slots A2, A6, and A10
Slots B2, B6, and B10
Voltage Frequency (in MT/s)
2400, 2133, 1866
1.2 V 2400, 2133, 1866
1866
2400, 2133, 1866
1.2 V 2400, 2133, 1866
2133, 1866
Channel 2
Slots A3, A7, and A11
Slots B3, B7, and B11
Operating Maximum DIMM Rank/
Channel
Dual rank or single rank
Dual rank or single rank
Dual rank or single rank
Quad rank
Quad rank
Quad rank
Channel 3
Slots A4, A8, and A12
Slots B4, B8, and B12
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