Installing Dimms - HP Compaq dc7800 Reference Manual

be populated with the two 512-MB DIMMs. With this configuration, 2-GB will run as dual channel
and 512-MB will run as single channel.
●
In any mode, the maximum operational speed is determined by the slowest DIMM in the system.

Installing DIMMs

CAUTION:
Regardless of the power-on state, voltage is always supplied to the memory modules as long as the
computer 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.
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 computer 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
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
2. Remove the access panel
3. Locate the memory module sockets on the system board.
WARNING!
components to cool before touching.
118 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis
You must disconnect the power cord before adding or removing memory modules.
(Computer Access Panel on page
To reduce risk of personal injury from hot surfaces, allow the internal system
Electrostatic Discharge Information on page
(Preparation for Disassembly on page
113).
53.
107).