Acer Aspire X3990 - Page 85

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