System Memory; Dimms; Memory Module Installation - Compaq 141536-002 - Deskpro EN - MT RAMBUS Maintenance And Service Manual

4.16

System Memory

The computer comes with synchronous dynamic random access memory (SDRAM) dual
inline memory modules (DIMMs).
4.16.1

DIMMs

The memory sockets on the Intel 815e chipset–based 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.
For proper system operation, the DIMMs must be industry-standard 168-pin, unbuffered
PC100– or PC133– compliant SDRAM DIMMs, depending on the model. The SDRAM
DIMMs must support CAS Latency 2 or 3 (CL = 2 or CL = 3). They must also contain the
mandatory Joint Electronic Device Engineering Council (JEDEC) Serial Presence Detect
(SPD) information. DIMMs constructed with x4 SDRAM (16 ICs per side) are not
supported; the system will not start using unsupported DIMMs.
The Intel 815e chipset supports both PC100 and PC133 SDRAM DIMMs. PC133 DIMMs
should be used for optimal performance. If both PC100 and PC133 SDRAM DIMMs are
installed in a computer, the system memory will run at the lower 100Mhz speed. Some
configurations of PC133 SDRAMs may run at 100Mhz, instead of 133Mhz.
4.16.2

Memory Module Installation

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:
optional cards. Before beginning these procedures, ensure that you are discharged of static
electricity by briefly touching a grounded metal object. Refer to Appendix F, "Electrostatic
Discharge," for more information.
CAUTION:
Doing so may damage the module.
1. If you have locked the Smart Cover Lock, use Computer Setup to unlock the lock and
disable the Smart Cover Sensor.
2. Shut down the operating system properly, then turn off the computer and any external
devices, then disconnect the power cord from the power outlet.
3. Remove the access panel and locate the memory module sockets.
WARNING: To reduce risk of personal injury from hot surfaces, allow the internal system
!
components to cool before touching.
Your memory module sockets have gold metal contacts. When upgrading your
Static electricity can damage the electronic components of the computer or
When handling a memory module, be careful not to touch any of the contacts.
Compaq Deskpro EN Series of Personal Computers 4-27