HP xw3400 HP xw3400 Workstation - Hardware Reference Guide - Page 20

Installing DIMMs, CAUTION, WARNING - memory

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● If a single DIMM is installed, it must be installed in the XMM3 socket. ● In either mode, the maximum operational speed is determined by the slowest DIMM in the system. Installing DIMMs CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power to drain before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to the memory modules as long as the workstation is plugged into an active AC outlet. Adding or removing memory modules while voltage is present may cause irreparable damage to the memory modules or system board. If you see an LED light on the system board, voltage is still present. The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is important to use memory modules with gold-plated metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other. Static electricity can damage the electronic components of the workstation or optional cards. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. For more information, refer to Appendix D, Electrostatic discharge on page 41. When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the module. 1. Remove/disengage any security devices that prohibit opening the workstation. 2. Remove all removable media, such as diskettes or compact discs, from the workstation. 3. Turn off the workstation properly through the operating system, then turn off any external devices. 4. Disconnect the power cord from the power outlet and disconnect any external devices. CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power to drain before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to the memory modules as long as the workstation is plugged into an active AC outlet. Adding or removing memory modules while voltage is present may cause irreparable damage to the memory modules or system board. If you see an LED light on the system board, voltage is still present. 5. Remove the workstation access panel. 6. Locate the memory module sockets on the system board. WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system components to cool before touching. 14 Chapter 2 Hardware upgrades ENWW

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If a single DIMM is installed, it must be installed in the XMM3 socket.
In either mode, the maximum operational speed is determined by the slowest DIMM in the system.
Installing DIMMs
CAUTION:
You must disconnect the power cord and wait approximately 30 seconds for the power to
drain before adding or removing memory modules. Regardless of the power-on state, voltage is always
supplied to the memory modules as long as the workstation is plugged into an active AC outlet. Adding
or removing memory modules while voltage is present may cause irreparable damage to the memory
modules or system board. If you see an LED light on the system board, voltage is still present.
The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is important
to use memory modules with gold-plated metal contacts to prevent corrosion and/or oxidation resulting
from having incompatible metals in contact with each other.
Static electricity can damage the electronic components of the workstation or optional cards. Before
beginning these procedures, ensure that you are discharged of static electricity by briefly touching a
grounded metal object. For more information, refer to Appendix D,
Electrostatic discharge
on page
41
.
When handling a memory module, be careful not to touch any of the contacts. Doing so may damage
the module.
1
.
Remove/disengage any security devices that prohibit opening the workstation.
2
.
Remove all removable media, such as diskettes or compact discs, from the workstation.
3
.
Turn off the workstation properly through the operating system, then turn off any external devices.
4
.
Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION:
You must disconnect the power cord and wait approximately 30 seconds for the power
to drain before adding or removing memory modules. Regardless of the power-on state, voltage is
always supplied to the memory modules as long as the workstation is plugged into an active AC
outlet. Adding or removing memory modules while voltage is present may cause irreparable damage
to the memory modules or system board. If you see an LED light on the system board, voltage is still
present.
5
.
Remove the workstation access panel.
6
.
Locate the memory module sockets on the system board.
WARNING!
To reduce risk of personal injury from hot surfaces, allow the internal system
components to cool before touching.
14
Chapter
2
Hardware upgrades
ENWW