Dell OptiPlex GX1 Reference And Installation Manual page 105

Follow the instructions in "Installing a DIMM" or Removing a DIMM," as appro-
priate, found later in this section.
NOTE: After you remove and replace the cover, the chassis intrusion detector will
cause the following message to be displayed at the next system start-up:
ALERT! Cover was previously removed.
After the system completes the power-on self-test (POST) routine, the system
runs a memory test that displays the total memory of all installed DIMMs, includ-
ing those you just installed.
NOTE: If the memory total is incorrect, turn off your computer and peripherals
and disconnect them from their power sources, remove the computer cover, and
make sure that the installed DIMMs are seated properly in their sockets. Then
repeat this step.
The system detects that the new memory does not match the existing system
configuration information, which is stored in nonvolatile random-access memory
(NVRAM), and generates the following message:
The amount of system memory has changed.
Strike the F1 key to continue, F2 to run the setup utility
The system should have already changed the value in the System Memory cate-
gory to reflect the newly installed memory. Verify the new total.
NOTES: If the memory total is incorrect, turn off your computer and peripherals
and disconnect them from their power sources, remove the computer cover, and
check the installed DIMMs to make sure that they are seated properly in their
sockets. Then repeat steps 6 and 7.
The value of System Memory is given in kilobytes (KB). To convert KBs to MBs,
divide the KB total by 1024.
See your Diagnostics and Troubleshooting Guide for information on running the
Dell Diagnostics and troubleshooting any problems that may occur.
Installing System Board Options 6-9