Mode-Specific Guidelines - Dell PowerEdge FC630 Owner's Manual

• A maximum of three single- or dual-rank RDIMMs can be populated in a channel.
• Populate DIMM 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 sockets with white release tabs first, black, and then green.
• Populate the sockets by highest capacity DIMM in the following order - first in sockets with white
release levers and then black. For example, if you want to mix 16 GB and 8 GB DIMMs, populate 16 GB
DIMMs in the sockets with white release tabs and 8 GB DIMMs in the sockets with black release tabs.
• In a dual-processor configuration, the memory configuration for each processor must 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 sizes can be mixed provided that other memory population rules are
followed (for example, 4 GB and 8 GB memory modules can be mixed).
• Depending on mode-specific guidelines, populate four DIMMs per processor (one DIMM per channel)
at a time to maximize performance. For more information, see the Mode-specific guidelines section.
Table 22. Heat sink — processor configurations
Processor Processor Type (in
Configuration Watts)
Single processor 105 W, 120 W or 135
W
Single processor 135 W (four cores, six
cores, or eight cores),
145 W, or 105 W (for
acoustic
configuration)
NOTE: When using an 104 mm wide heat sink for a single processor, the memory module
sockets A6, A8, A10, and A12 are not available for population.
Dual processor 105 W, 120 W or 135
W
Dual processor 135 W (four cores, six
cores, or eight cores),
145 W, or 105 W (for
acoustic
configuration)
Related Links

Mode-specific guidelines

Mode-specific guidelines
Four memory channels are allocated to each processor. The allowable configurations depend on the
memory mode selected.
Advanced Error Correction Code (lockstep)
Advanced Error Correction Code (ECC) mode extends SDDC from x4 DRAM based DIMMs to both x4 and
x8 DRAMs. This protects against single DRAM chip failures during normal operation.
The installation guidelines for memory modules are as follows:
• Memory modules must be identical in size, speed, and technology.
Heat
Sink
Maximum System
Width
Capacity
68 12
mm
104 8 (Three DIMMs in
mm channel 0 and channel
2 and two DIMMs in
channel 1 and channel
3)
68 24
mm
104 16 (Three DIMMs in
mm channel 0 and channel
2 and two DIMMs in
channel 1 and channel
3)
Number of DIMMs
Reliability, Availability,
and Serviceability (RAS)
Features
12
4 (Two DIMMs per
channel)
24
8 (Two DIMMs per
channel)
67