DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —VERSION 1.5
4
Number
Name
Number
Name
1
Internal Speaker Connector (INT_SPKR)
13
PCI Connector(SLOT3)
2
Front IO Connector (FRONTPANEL)
14
PCI-e 4x Connector(SLOT4)
3
Thermal Sensor Connector(THRM_2)
15
Intrusion Switch Connector
(INTRUDER)
4
SATA 0 Connector(SATA0)
16
System Fan Connector (FAN_HDD)
5
SATA 1 Connector(SATA1)
17
P2 Power Connector
(12V_PWRCONN)
6
SATA 2 Connector(SATA2)
18
Processor Connector (N/A)
7
SATA 3 Connector(SATA3)
19
CPU fan Connector (FAN_CPU)
8
Internal USB Connector (INT_USB)
20
Memory Connectors(DIMM1, DIMM2,
DIMM3, DIMM4)
9
Buzzer (BEEP)
21
Power Switch Connector (PWR_SW)
10
LPC Debug Connector (LPC_DEBUG)
22
Battery Connector (BATTERY)
11
PCI-e 16x Connector(SLOT1)
23
P1 Power Connector (POWER)
12
PCI-e 1x Connector(SLOT2)
MT System Board Components