Owners Manual

Table 5. Memory configurations
Populated system
capacity (in GB)
Memory module size
(in GB)
Number of memory
modules
Memory module rank,
organization, and
frequency
Memory module slot
population
8 8 1 1R, x8, 3200 MT/s or
2666 MT/s
A1
16 16 1 1R, x16, 3200 MT/s or
2666 MT/s
A1
General memory module installation guidelines
To ensure optimal performance of your system, observe the following general guidelines when configuring your system memory.
If your system memory configuration does not follow these guidelines, your system might not boot, it might stop responding
during memory configuration, or it might operate 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:
● All DIMMs must be DDR4.
● A maximum of two different ranked DIMMs can be populated in a 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).
● Populate memory module sockets only if a processor is installed. For single-processor systems, sockets A1 to A4 are
available.
● In Optimizer Mode, the DRAM controllers operate independently in the 64-bit mode and provide optimized memory
performance.
Table 6. Memory population rules
Processor Configuration Memory population Memory population
information
Single processor Optimizer (Independent
channel) population order
1, 2, 3, 4 Odd amount of DIMMs per
processor allowed.
● Populate all the sockets with white release tabs first, followed by the black release tabs.
● When mixing memory modules with different capacities, populate the sockets with memory modules with the highest
capacity first.
For example, if you want to mix 8 GB and 16 GB memory modules, populate 16 GB memory modules in the sockets with white
release tabs and 8 GB memory modules in the sockets with black release tabs.
● Memory modules of different capacities can be mixed provided other memory population rules are followed.
For example, 8 GB and 16 GB memory modules can be mixed.
● Mixing of more than two memory module capacities in a system is not supported.
● Unbalanced memory configurations will result in a performance loss so always populate memory channels identically with
identical DIMMs for best performance.
● To ensure proper system cooling, memory module blanks must be installed in memory sockets that are not occupied.
Removing a memory module
Prerequisites
1. Follow the safety guidelines listed in Safety instructions.
2. Follow the procedures in Before working inside your system.
3. Remove the air shroud.
NOTE:
The memory modules are hot to touch for some time after the system has been powered down. Allow the memory
modules to cool before handling them. Handle the memory modules by the card edges and avoid touching the components
or metallic contacts on the memory module.
64 Installing and removing system components