Dell OptiPlex GX270 - Manual (Page 19)

Small Mini-Tower System Board
1 floppy-drive connector (DSKT) 11 CD drive audio cable connector (CD_IN)
2 CD/DVD drive connector (IDE2) 12 front-panel audio cable connector (FRONTAUDIO)
3 battery socket (BATTERY) 13 power connector (12VPOWER)
4 front-panel connector (FRONTPANEL) 14 serial port connector (SER2) for optional serial port cards
5 IDE hard-drive connector (IDE1) 15 microprocessor and heat sink connector (CPU)
6 serial ATA hard-drive connector (SATA1) 16 microprocessor fan connector (FAN)
7 internal speaker (SPEAKER) 17 memory module connectors (DIMMs 1, 3, 2, and 4)
8 standby power light (AUX_PWR) 18 power connector (POWER)
9 AGP card connector (AGP) 19 RTC reset jumper (RTCRST)
10 PCI riser board connector (PCI2) 20 password jumper (PSWD)