Dell OptiPlex 990 Technical Guide - Page 4

MT System Board Components - memory

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DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK -V 1.0 MT System Board Components Number Name Number Name 1 Internal Speaker Connector (INT_SPKR) 13 PCI Connector(SLOT3) 2 Front IO Connector (FRONTPANEL) 3 Thermal Sensor Connector(THRM_2) 4 SATA 0 Connector(SATA0) 5 SATA 1 Connector(SATA1) 14 PCI-e 4x Connector(SLOT4) 15 Intrusion Switch Connector (INTRUDER) 16 System Fan Connector (FAN_HDD) 17 P2 Power Connector (12V_PWRCONN) 6 SATA 2 Connector(SATA2) 18 Processor Connector (N/A) 7 SATA 3 Connector(SATA3) 8 Internal USB Connector (INT_USB) 9 Buzzer (BEEP) 19 CPU fan Connector (FAN_CPU) 20 Memory Connectors(DIMM1, DIMM2, DIMM3, DIMM4) 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) 4

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DELL™ OPTIPLEX™ 990
TECHNICAL GUIDEBOOK
—
V 1.0
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