Installing Additional Memory; Dimms - HP d325 ST Hardware Reference Manual

Hardware Upgrades
5. Keep the top of the power supply and its fan access area
Keep all cables away from the top of the power supply to prevent pinching or
cutting. Also, keep cables away from the fan blade area to prevent them from
interfering with the fan rotation or reducing the air flow.

Installing Additional Memory

The computer comes with double data rate synchronous dynamic random access
memory (DDR-SDRAM) dual inline memory modules (DIMMs).

DIMMs

The memory sockets on the system board can be populated with industry-standard
DIMMs. These memory module slots are populated with at least one preinstalled
memory module. To achieve the maximum memory support, you may be required to
replace the preinstalled DIMM with a higher capacity DIMM.
If you are adding a second DIMM or replacing a single smaller DIMM with two
larger DIMMs, both DIMMs should be of the same speed and capacity in order to
achieve a higher performing, dual-channel mode. The system will automatically
operate in single-channel mode or a higher performing, dual-channel mode,
depending on how the DIMMs are installed.
If only one DIMM is installed, the system will operate in a single-channel mode.
If two DIMMs are installed, the system will operate in a dual-channel mode. The
maximum operating speed will be determined by the slowest DIMM. For
example, if the system is populated with a 266-MHz DIMM and a 333-MHz
DIMM, the system will run at only 266 MHz. For maximum performance
improvement, install identical high-performance DIMMs.
2-10
5
clear at all times.
Hardware Reference Guide