Dell OptiPlex 980 (Early 2010) - Manual (Page 12)

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System Board Layout
Dell™ OptiPlex™ 980 Service Manual—Small Form Factor
1 service mode jumper (Service_Mode) 2 RTC reset jumper (RTCRST)
3 battery socket (BATTERY) 4 PCI Express x16 card connector(SLOT1)
5 PCI card connector (SLOT2) 6 internal serial card connector (Serial2)
7 thermal sensor connector (THRM3) 8 speaker connector (INT_SPKR)
9
PCI Express x1 wireless card connector
(PCIE_WLS1)
10 fan connector (FAN_CPU)
11 power connector (12V POWER) 12 memory module connectors (DIMM_1-4)
13 front panel connector (FRONTPANEL) 14 internal buzzer (BEEP)
15 password jumper (PSWD) 16 intruder connector (INTRUDER)
17 SATA drive connectors (SATA0-2) 18 internal USB connector (INT_USB)
19 front I/O connector (FIO) 20 power connector (MICRO_PWR)
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