Dell OptiPlex 740 - Manual (Page 28)

System Board Components
1 drive release latch 2 optical drive 3 power supply
4 chassis intrusion switch (optional) 5 system board 6 card slots
7 heat sink assembly 8 front I/O panel
1 speaker connector
(INT_SPKR) 2 processor socket
(CPU) 3 memory module connectors
(DIMM_1, DIMM_2, DIMM_3,
DIMM_4)
4 power connector
(PW_12V_A1) 5 power connector
(POWER1) 6 SATA drive connectors (SATA0,
SATA1, SATA2)
7 front-panel connector
(FRONTPANEL) 8 intrusion switch
connector
(INTRUDER) 9 CMOS reset jumper (RTCRST)
10 battery socket
(BATTERY)
11 internal USB (USB1) 12 PCI Express x16 connector
(SLOT1)
13 standby
(AUX_PWR_LED)
14 PCI connector
(SLOT2)
15 PCI Express x1 connector
(SLOT4)
16 PCI connector (SLOT3) 17 password jumper
(PSWD)
18 floppy drive connector (DSKT)
19 serial connector
(PS2/SER2)
20 optional DVI-card
connector (DVI_HDR)
21 fan connector (FAN_CPU)