Memory; Ddr2-Sdram Dimms; Installing Memory Modules - HP dx7400 - Microtower PC Service & Reference Manual

Memory

The computer comes with double data rate 2 synchronous dynamic random access memory (DDR2-
SDRAM) dual inline memory modules (DIMMs).
CAUTION:

DDR2-SDRAM 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 8 GB (4 x 2 GB) of memory configured
in a high-performing dual channel mode.
For proper system operation, the DDR2-SDRAM DIMMs must be:
●
industry-standard 240-pin
● unbuffered PC2-5300 667 MHz-compliant and unbuffered PC2-6400 800 MHz-compliant
●
1.8 volt DDR2-SDRAM DIMMs
The DDR2-SDRAM DIMMs must also:
●
support CAS latency 4 for PC2-5300 667 MHz and PC2-6400 800 MHz
●
contain the mandatory JEDEC SPD information
In addition, the computer supports:
●
256Mbit, 512Mbit, and 1Gbit non-ECC memory technologies
●
single-sided and double-sided DIMMs
●
DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not
supported
NOTE: The system will not start if you install unsupported DIMMs.

Installing Memory Modules

CAUTION:
is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation
resulting from having incompatible metals in contact with each other.
CAUTION:
Before beginning these procedures, ensure that you are discharged of static electricity by briefly
touching a grounded metal object.
CAUTION:
may damage the module.
1. Prepare the computer for disassembly
2. Remove the access panel.
DDR and DDR2 memory modules are not interchangeable.
The memory module sockets have gold metal contacts. When upgrading the memory, it
Static electricity can damage the electronic components of the computer or optional cards.
When handling a memory module, be careful not to touch any of the contacts. Doing so
(Access Panel on page
(Preparation for Disassembly on page
57)
56).
Memory 61