Memory; Populating Dimm Sockets - HP Pro G2 SFF Manual

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Memory

The computer comes with a double data rate 4 synchronous dynamic random access memory (DDR4-SDRAM)
dual inline memory module (DIMM).
The memory sockets on the system board can be populated with up to two industry-standard DIMMs. These
memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum memory
support, you can populate the system board with up to 32 GB of memory configured in a high-performing
dual channel mode.
For proper system operation, the DIMMs must adhere to the following specifications:
Industry-standard 288-pin
Unbuffered, non-ECC, PC4-21300, DDR4-2666 MHz-compliant
1.2 volt DDR4-SDRAM memory modules
CAS latency 17 DDR4 2666 MHz (17-17-17 timing)
Mandatory JEDEC SPD information
The computer supports the following:
512 MB, 1 GB, 2 GB, and 4 GB non-ECC memory technologies
Single-sided and double-sided memory modules
Memory modules constructed with ×8 and ×16 DDR devices; memory modules constructed with ×4
SDRAM are not supported
NOTE:
The system does not operate properly if you install unsupported memory modules.

Populating DIMM sockets

There are two memory sockets on the system board, labeled DIMM1 and DIMM2.
The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending
on how the DIMMs are installed.
NOTE:
Single-channel and unbalanced dual-channel memory configurations will result in inferior graphics
performance.
The system will operate in single-channel mode if the DIMM sockets are populated in one channel only.
The system will operate in a higher-performing dual-channel mode if the total memory capacity of the
DIMM in Channel A is equal to the total memory capacity of the DIMM in Channel B. The technology and
device width can vary between the channels. For example, if Channel A is populated with one 4 GB DIMM
and Channel B is populated with one 4 GB DIMM, the system will operate in dual-channel mode.
The system will operate in flex mode if the total memory capacity of the DIMM in Channel A is not equal
to the total memory capacity of the DIMM in Channel B. In flex mode, the channel populated with the
least amount of memory describes the total amount of memory assigned to dual channel and the
remainder is assigned to single channel.
In any mode, the maximum operational speed is determined by the slowest DIMM in the system.
Memory
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