Acer Aspire X3990 Service Manual page 85

No Label
1 CPU
2 SYS_FAN
3 CPU_FAN
4 DIMM1~2
5 GPIO1
6 GPIO2
7 ATX_POWER
8 F_USB3
9 F_USB2
10 SATA1~2
77
Description
LGA1155 socket for
Intel® Sandy Bridge
processor family
System cooling fan
connector
CPU cooling fan
connector
240-Pin DDR3
SDRAM
slots(Channel A:
DIMM2 Channel B:
DIMM1)
General Purpose I/O
Signal 1
General Purpose I/O
Signal 2
Standard 24-pin ATX
power connector
Front panel USB
header (card reader)
Front panel USB
headers
Serial ATA 3.0Gb/s
connectors (Black
color)
No Label
11 F_PANEL
12 CLR_CMOS
13 BZ1
14 ME_DISABLE
15 SPDIF_OUT
16 F_AUDIO
17 PCIE 16X
18 PCIE1X_1
19 ATX_12V
Description
Front panel switch/
LED header
Clear CMOS jumper
Buzzer
ME Disable Header
SPDIF out header
Front panel audio
header
PCI Express x16 slot
PCI Express x1 slot
Auxiliary 4-pin power
connector
Chapter 5