HP EliteDesk 800 G3 Tower PC User Manual download pdf (Page 19)

Upgrading system memory

The computer comes with double data rate 4 synchronous dynamic random access memory (DDR4-SDRAM)

dual inline memory modules (DIMMs).

The memory sockets on the system board are populated with at least one preinstalled memory module. To

achieve the maximum memory support, you can populate the system board with up to 64 GB of memory

congured in a high-performing dual-channel mode.

For proper system operation, the DIMMs must adhere to the following specications:

●

Industry-standard 288-pin

●

Unbuered non-ECC PC4-19200 DDR4-2400 MHz-compliant

●

1.2 volt DDR4-SDRAM memory modules

●

CAS latency 17 DDR4 2400 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 x8 and x16 DDR devices; memory modules constructed with x4

SDRAM are not supported

NOTE: The system does not operate properly if you install unsupported memory modules.

Installing a memory module

There are four memory sockets on the system board, with two sockets per channel. The sockets are labeled

DIMM1, DIMM2, DIMM3, and DIMM4. Sockets DIMM1 and DIMM2 operate in memory channel B. Sockets DIMM3

and DIMM4 operate in memory channel A.

The system will automatically operate in single-channel mode, dual-channel mode, or ex mode, depending

on how the DIMMs are installed.

NOTE: Single-channel and unbalanced dual-channel memory congurations 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

DIMMs in Channel A is equal to the total memory capacity of the DIMMs in Channel B. The technology and

device width can vary between the channels. For example, if Channel A is populated with two 1 GB

DIMMs and Channel B is populated with one 2 GB DIMM, the system will operate in dual-channel mode.

●

The system will operate in ex mode if the total memory capacity of the DIMMs in Channel A is not equal

to the total memory capacity of the DIMMs in Channel B. In ex 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. For optimal speed, the channels should be balanced so that the

largest amount of memory is spread between the two channels. If one channel will have more memory

than the other, the larger amount should be assigned to Channel A. For example, if you are populating

the sockets with one 2 GB DIMM, and three 1 GB DIMMs, Channel A should be populated with the 2 GB

Upgrading system memory 13

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HP EliteDesk 800 G3 Tower PC User Manual Page 19

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