Compaq dc5850 Service Reference Guide: HP Compaq dc5850 Business PC - Page 83

CAUTION, WARNING, Electrostatic Discharge Information, on Preparation for Disassembly

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CAUTION: The memory module sockets have gold metal contacts. When upgrading the 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. Static electricity can damage the electronic components of the computer or optional cards. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. Refer to Electrostatic Discharge Information on page 53 for more information. When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the module. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system components to cool before touching. 3. Open both latches of the memory module socket (1), and insert the memory module into the socket (2). NOTE: A memory module can be installed in only one way. Match the notch on the module with the tab on the memory socket. A DIMM must occupy the XMM4 socket. Always populate XMM4 before XMM2, and XMM3 before XMM1 (populate the black sockets before white sockets in each channel). In order to create a dual-channel memory configuration, the memory capacity of XMM4 must equal the memory capacity of XMM3 (and XMM2 must equal XMM1, if used). Refer to Populating DIMM Sockets on page 120 for more information. 4. Push the DIMM module down firmly into the socket, ensuring that the module is fully inserted and properly seated. The DIMM must be pushed all the way down into the socket and sit evenly in the socket to avoid memory corruption. Make sure the latches are in the closed position (3). 5. Repeat steps 3 and 4 for any additional modules that you want to install. NOTE: The computer automatically recognizes the additional memory when turned on. To reassemble the computer, reverse the removal procedure. Memory 71

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CAUTION:
The memory module sockets have gold metal contacts. When upgrading the 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.
Static electricity can damage the electronic components of the computer or optional cards. Before
beginning these procedures, ensure that you are discharged of static electricity by briefly touching a
grounded metal object. Refer to
Electrostatic Discharge Information
on page
53
for more information.
When handling a memory module, be careful not to touch any of the contacts. Doing so may damage
the module.
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
61
).
2.
Remove the computer access panel (
Computer Access Panel
on page
66
).
WARNING!
To reduce risk of personal injury from hot surfaces, allow the internal system
components to cool before touching.
3.
Open both latches of the memory module socket
(1)
, and insert the memory module into the
socket
(2)
.
NOTE:
A memory module can be installed in only one way. Match the notch on the module with
the tab on the memory socket.
A DIMM must occupy the XMM4 socket. Always populate XMM4 before XMM2, and XMM3 before
XMM1 (populate the black sockets before white sockets in each channel).
In order to create a dual-channel memory configuration, the memory capacity of XMM4 must equal
the memory capacity of XMM3 (and XMM2 must equal XMM1, if used). Refer to
Populating DIMM
Sockets
on page
120
for more information.
4.
Push the DIMM module down firmly into the socket, ensuring that the module is fully inserted and
properly seated. The DIMM must be pushed all the way down into the socket and sit evenly in the
socket to avoid memory corruption. Make sure the latches are in the closed position
(3)
.
5.
Repeat steps 3 and 4 for any additional modules that you want to install.
NOTE:
The computer automatically recognizes the additional memory when turned on.
To reassemble the computer, reverse the removal procedure.
Memory
71