Dell OptiPlex GX520 User Manual page 161

3 power supply and fan 7 power button
4 hard drive 8 front panel door
System Board Components
1 fan connector (FAN)
2 processor connector (CPU)
3 power connector (12VPOWER)
4 memory module connectors (DIMM_1 and DIMM_2) 13 PCI connector (SLOT2)
5 serial ATA drive connector (SATA0)
6 front-panel connector (FNT_PANEL)
7 power connector (POWER)
8 CD/DVD drive connector (IDE)
9 RTC reset jumper (RTCRST)
Jumper Settings
Small Form Factor Computer
Jumper Setting Description
PSWD Password features are enabled.
10 chassis intrusion switch connector (INTRUDER)
11 password jumper (PSWD)
12 battery socket (BATT)
14 serial connector (SER2)
15 floppy-drive connector (DSKT)
16 standby power indicator (AUX_PWR)
17 system board speaker (BEEP)
18 internal speaker (INT_SPKR)