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channel 2: slots B3, B7, and B11
channel 3: slots B4, B8, and B12
Mode-Specific Guidelines
Four memory channels are allocated to each processor. The allowable configurations depend on the memory mode
selected.
NOTE: x4 and x8 DRAM based DIMMs can be mixed providing support for RAS features. However, all guidelines for
specific RAS features must be followed. x4 DRAM based DIMMs retain Single Device Data Correction (SDDC) in
memory optimized (independent channel) mode. x8 DRAM based DIMMs require Advanced ECC mode to gain
SDDC.
The following sections provide additional slot population guidelines for each mode.
Memory Optimized (Independent Channel) Mode
This mode supports SDDC only for memory modules that use x4 device width and does not impose any specific slot
population requirements.
Memory Configuration
The following table shows the memory configuration for a two processor configuration.
NOTE: 2R in the following table indicates dual ranked DIMMs.
Table 1. Memory Configuration
Configuratio
n
System
Capacity (in
GB)
DIMM Size
(in GB)
Number of
DIMMs
DIMM Rank,
Organization, and
Frequency
DIMM Slot Population
Standard 64 4 16
2R, x8, 1600 MT/s, A1, A2, A3, A4, A5, A6, A7, A8
B1, B2, B3, B4, B5, B6, B7, B8
8 8
A1, A2, A3, A4
B1, B2, B3, B4
16 4
A1, A2
B1, B2
High
capacity
128 16 8
2R, x8, 1600 MT/s, A1, A2, A3, A4
B1, B2, B3, B4
Removing Memory Modules
WARNING: The memory modules are hot to the touch for some time after the system has been powered down.
Allow time for the memory modules to cool before handling them. Handle the memory modules by the card edges
and avoid touching the components or gold contacts on the memory module.
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your
warranty. Read and follow the safety instructions that came with the product.
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