Dell Precision 620 - Manual (Page 22)

System Board Labels
Table 2 lists the labels for connectors and sockets on your system board, and it gives a brief description of their functions.
Table 2. System Board Connectors and Sockets
Memory
jumpered unjumpered
Connector or Socket Description
AGP AGP video card connector
AUX Aux-in audio card connector
AUX LED Hard-disk drive access indicator connector
BATTERY Battery socket
BAY_PWR External bay devices power connector
(CD-ROM drive, optional diskette drive, etc.)
CD-IN CD-ROM drive audio interface connector
DISKETTE Diskette drive interface connector
ENET Network interface controller (NIC) connector
FAN Microprocessor fan connector
FAN_CCAG Card cage fan speed control connector
FAN_CPU CPU fan connector
FAN_H1 Processor 1 heat sink fan
FAN_H2 Processor 2 heat sink fan
FAN_SYS System fan
IDEn EIDE interface connector
KYBD/MOUSE Keyboard connector and mouse connector (stacked)
LAN Wakeup on LAN card connector
LINE-IN Audio line-in jack
LINE-OUT Audio line-out jack
MEC_A MEC socket (channel A)
MEC_B MEC socket (channel B)
MIC Microphone jack
PANEL Control panel connector
PARALLEL/SCSI Parallel port connector (sometimes referred to as LPT1) and SCSI connector (stacked)
PCI1, PCI2, PCI3, PCI4 32-bit PCI expansion-card connectors
PCI5, PCI6 64-bit PCI expansion-card connectors
MT PWR1 Main power input connector 1
MT PWR2 Main power input connector 2
RAID Optional RAID PCI expansion card connector extension
SCSI_NARROW Secondary SCSI connector
SCSI_ULTRA2 Primary SCSI connector
SERIAL1/2 Serial port connectors (sometimes referred to as COM1 and COM2; stacked)
S2_PRI Primary Intel ® Pentium®: III Xeon™ microprocessor SECC connector
S2_SEC Secondary Pentium III Xeon processor SECC connector
TAPI TAPI input card connector (voice modem to audio system interface)
USB USB connectors
WUOL Wakeup on LAN connector