Ddr2-Sdram Dimms; Installing Memory Modules - HP Compaq dx2250 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 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
●
1.8 volt DDR2-SDRAM DIMMs
The DDR2-SDRAM DIMMs must also:
●
support CAS latency 4 and 5 for DDR2/667 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:

Installing Memory Modules

CAUTION:
memory, it 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:
cards. Before beginning these procedures, ensure that you are discharged of static electricity by
briefly touching a grounded metal object.
64 Chapter 7 Removal and Replacement Procedures— Microtower (MT) Chassis
DDR and DDR2 memory modules are not interchangeable.
The system will not start if you install unsupported DIMMs.
The memory module sockets have gold metal contacts. When upgrading the
Static electricity can damage the electronic components of the computer or optional
ENWW