Dell OptiPlex GX1 Reference And Installation Manual page 103

NOTE: Installing filler brackets over empty card-slot openings is necessary to
maintain Federal Communications Commission (FCC) certification of the system.
The brackets also keep dust and dirt out of your computer.
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.
See Chapter 2, "Using the System Setup Program," for instructions.
NOTE: If a setup password has been assigned by someone else, contact your
network administrator for information on resetting the chassis intrusion detector.
Memory can be increased to a maximum of 384 megabytes (MB) by installing combi-
nations of 32-, 64-, or 128-MB dual in-line memory modules (DIMMs) in the three
DIMM sockets on the system board. Figure 6-6 shows the DIMMs and DIMM
sockets.
Your system can support both error checking and correction (ECC) and nonparity syn-
chronous dynamic random-access memory (SDRAM) DIMMs. However, ECC support
is available only if all DIMMs are ECC DIMMs. ECC DIMMs enable your system to
correct all single-bit memory errors and detect multibit memory errors.
DIMMs (3)
DIMM
sockets
Installing System Board Options 6-7