GIGABYTE GA-970A-DS3 (rev. 3.0) Owner's Manual | Page 15
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3/4/5) CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN (Fan Headers)
Themotherboardhasa4-pinCPUfanheader(CPU_FAN),a3-pin(SYS_FAN2)anda4-pin(SYS_FAN1)
systemfanheaders,anda3-pinpowerfanheader(PWR_FAN).Mostfanheaderspossessafoolproof
insertiondesign.Whenconnectingafancable,besuretoconnectitinthecorrectorientation(theblack
connectorwireisthegroundwire).Thespeedcontrolfunctionrequirestheuseofafanwithfanspeed
control design. For optimum heat dissipation, it is recommended that a system fan be installed inside the
chassis.
1
CPU_FAN
SYS_FAN1
PWR_FAN
DEBUG
PORT
G.QBOFM
SYS_FAN2
1
1
1
CPU_FAN:
SYS_FAN1:
SYS_FAN2/PWR_FAN:
Pin No. Definition
1
GND
2
+12V
3
Sense
4
Speed Control
Pin No. Definition
1
GND
2
+12V
3
Sense
4
Reserve
Pin No. Definition
1
GND
2
+12V
3
Sense
DEBUG
PORT
G.QBOFM
6) CLR_CMOS (Clear CMOS Jumper)
UsethisjumpertocleartheCMOSvalues(e.g.dateinformationandBIOSconfigurations)andresetthe
CMOSvaluestofactorydefaults.TocleartheCMOSvalues,useametalobjectlikeascrewdrivertotouch
the two pins for a few seconds.
Open: Normal
Short: Clear CMOS Values
• Be sure to connect fan cables to the fan headers to prevent your CPU and system from overheating. Overheating
may result in damage to the CPU or the system may hang.
• Thesefanheadersarenotconfigurationjumperblocks.Donotplaceajumpercapontheheaders.
• Always turn off your computer and unplug the power cord from the power outlet before clearing
the CMOS values.
• Aftersystemrestart,gotoBIOSSetuptoloadfactorydefaults(selectLoadOptimized
Defaults)ormanuallyconfiguretheBIOSsettings(refertoChapter2,"BIOSSetup,"forBIOS
configurations).
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