Dell OptiPlex GX150 - Manual (Page 12)

System Board Labels
The following table lists the labels for connectors and sockets on the system board and gives a brief description of their functions.
System Board Connectors and Sockets
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18 Voltage regulator module (may not be removable on some systems)
19 Parallel port (upper) and serial port (2) (lower) connectors
20 Microprocessor fan connector
21 Microprocessor and heat sink assembly
Connector or Socket Description
AGP Accelerated Graphics Port (AGP) Pro connector
AUDIO Line-in, line-out, and microphone jacks
AUX_PWR Auxiliary power indicator
BATTERY Battery socket
CD-IN CD-ROM drive audio cable connector
DIAG_LED Diagnostic LEDs
DIMM_x Dual in-line memory module (DIMM) socket
DSKT Diskette drive interface connector
FAN Microprocessor fan connector
FRONTAUDIO Front panel audio connector for onboard audio
FRONTPANEL Front panel cable connector
IDEn EIDE interface connector
KYBD_MOUSE Keyboard and mouse connectors
MICROPROCESSOR Microprocessor connector
MODEM Telephony connector
MONITOR Video connector
NIC_USB Integrated NIC connector and USB connectors
PAR_SER1_SER2 Parallel and serial port connectors
PCI1 and 2 PCI expansion card connectors
POWER Main power input connector
PSWD Password jumper
VRISER Riser board connector
SPEAKER Internal speaker
VRM Voltage regulator module connector (may not be removable on some systems)