General Memory Module Installation Guidelines; Mode-Specific Guidelines - Dell SD7000-S Owner's Manual

channel 2: slots A3 and A7
channel 3: slots A4 and A8
Processor 2 channel 0: slot B1
channel 1: slot B2
channel 2: slot B3
channel 3: slot B4
Table 10. Memory populations and operating frequencies for the supported configurations
DIMMs Populated/
DIMM Type
RDIMM

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:
• 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.
• Populate the sockets by highest rank count in the following order—first in sockets with white release
levers, then black, and then green. For example, if you want to mix single-rank and dual-rank memory
modules, populate dual-rank memory modules in the sockets with white release tabs and single-rank
memory modules in the sockets with black release tabs.
• When mixing memory modules with different capacities, populate the sockets with memory modules
with highest capacity first.
• 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.
• Populate four memory modules per processor (one DIMM per channel) at a time to maximize
performance.

Mode-specific guidelines

Four memory channels are allocated to each processor. The allowable configurations depend on the
memory mode selected.
64
Operating Frequency (in
Channel
1
Maximum DIMM Rank/Channel
MT/s)
1.2 V
2133 Dual rank