Memory; Dimms; Ddr4-Sdram Dimms; Populating Dimm Sockets - HP 280 G4 Maintenance And Service Manual

Memory

For a list of available memory modules, see
The computer comes with double data rate 4 synchronous dynamic random access memory (DDR4-SDRAM)
dual inline memory modules (DIMMs).

DIMMs

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.

DDR4-SDRAM DIMMs

For proper system operation, the DIMMs must be:
● Industry-standard 288-pin
● Unbuffered non-ECC PC4-21300 DDR4-2666 MHz-compliant
● 1.2 volt DDR4-SDRAM DIMMs
The DIMMs must also:
Support CAS latency 16 DDR4 2666 MHz (16-16-16 timing)
●
Contain the mandatory JEDEC SPD information
●
In addition, the computer supports:
512 Mbit, 1 Gbit, and 2 Gbit non-ECC memory technologies
●
Single-sided and double-sided DIMMs
●
DIMMs constructed with ×8 and ×16 DDR devices; DIMMs constructed with ×4 SDRAM are not supported
●
NOTE: The system will not operate properly if you install unsupported DIMMs.

Populating DIMM sockets

There are two DIMM sockets on the system board, with one socket per channel. The sockets are labeled
DIMM1 and DIMM2. Socket DIMM1 operates in memory channel A. Socket DIMM2 operates in memory channel
B.
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 result in inferior graphics
performance.
● The system operates in single-channel mode if the DIMM sockets are populated in one channel only.
● The system operates in a higher-performing dual-channel mode if the memory capacity of the DIMM in
Channel A is equal to the memory capacity of the DIMM in Channel B.
● The system operates in flex mode if the memory capacity of the DIMM in Channel A is not equal to the
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
Computer major components on page 4.
Memory 29