Gigabyte GA-990FXA-UD7 - Page 25

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Hardware Installation
4/5/6) CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN (Fan Headers)
 Themotherboardhasa4-pinCPUfanheader(CPU_FAN),a4-pin(SYS_FAN1)anda3-pin(SYS_FAN2)
systemfanheaders,anda3-pinpowerfanheader(PWR_FAN).Mostfanheaderspossessafoolproof
insertiondesign.Whenconnectingafancable,besuretoconnectitinthecorrectorientation(theblack
connectorwireisthegroundwire).Thespeedcontrolfunctionrequirestheuseofafanwithfanspeed
control design. For optimum heat dissipation, it is recommended that a system fan be installed inside the
chassis.
• Be sure to connect fan cables to the fan headers to prevent your CPU and system from overheat-
ing. Overheating may result in damage to the CPU or the system may hang.
• Thesefanheadersarenotcongurationjumperblocks.Donotplaceajumpercapontheheaders.
CPU_FAN:
Pin No. Denition
1 GND
2 +12V / Speed Control
3 Sense
4 Speed Control
SYS_FAN1:
Pin No. Denition
1 GND
2 +12V / Speed Control
3 Sense
4 Reserve
SYS_FAN2/PWR_FAN:
Pin No. Denition
1 GND
2 +12V
3 Sense
3) ATX4P (PCIe Power Connector)
The power connector provides auxiliary power to the onboard PCI Express x16 slots. When two or more
graphics cards are installed, we recommend that you connect the SATA power cable from the power supply
to the ATX4P connector to ensure system stability.
Pin No. Denition
1 NC
2 NC
3 NC
4 GND
5 GND
6
GND
7 VCC
8 VCC
9 VCC
10
GND
11 GND
12 GND
13 +12V
14 +12V
15 +12V
F_USB30
F_AUDIO(H) DB_PORT
F_PANEL(NH) F_PANEL
(H61M-D2) ACPI_CPT (GA-IVB)
BIOS_PH (GA-IVB)
SMB_CPT (GA-IVB)
CLR_CMOS CI DIS_ME GP15_CPT (GA-IVB) XDP_CPU XDP_PCH (GA-IVB)
TPM w/housing
Voltage measurement module(X58A-OC)
PCIe power connector (SATA)(X58A-OC)
DIP
123
DIP
123
DIP
123
DIP
123
1
1
1
1
BIOS Switcher (X58A-OC)
PWM Switch (X58A-OC)
M_SATA
PWM Switch (SW1)(X79-UD7)
DIP
1 2 3 4 5
Voltage measurement points(G1.Sniper 3)
BIOS Switcher (SW4)
PCIe Control (Z87X-UP7)
DIP
1 2 3
4
DIP
1 2 3 4
DIP
1 2 3
4
DIP
1 2 3 4
ATX_12V_2X3
F_USB3 (Front Panel)
15
1
1
CPU_FAN
SYS_FAN1
PWR_FAN
DEBUG
PORT
G.QBOFM
SYS_FAN2
1
1
1
DEBUG
PORT
G.QBOFM