Dell OptiPlex GX520 - Manual (Page 62)

Inside Your Computer
System Board Components
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.
CAUTION: To avoid electrical shock, always unplug your computer from the electrical outlet before removing the computer cover.
NOTICE: Be careful when opening the computer cover to ensure that you do not accidentally disconnect cables from the system board.
1 CD/DVD drive 5 system board
2 floppy drive 6 heat sink assembly
3 power supply 7 hard drive
4 chassis manual voltage-selection switch
1 fan connector (FAN) 12 password jumper (PSWD)
2 processor connector (CPU) 13 battery socket (BATT)
3 power connector (12VPOWER) 14 PCI Express x1 connector (SLOT4)