Gigabyte GA-X99-SLI - Page 25

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Hardware Installation
• 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.
4/5) CPU_FAN/SYS_FAN1/2/3 (Fan Headers)
All fan headers on this motherboard are 4-pin. 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.
CPU_FAN:
Pin No. Denition
1 GND
2 +12V
3 Sense
4 Speed Control
Pin No. Denition
1 VCC
2 GND
3 GND
4 +12V
SYS_FAN1
DEBUG
PORT
G.QBOFM
1
DEBUG
PORT
G.QBOFM
1
3) ATX4P (PCIe Power Connector)
The power connector provide auxiliary power to the onboard PCI Express x16 slots. When two or more
graphics cards are installed, we recommend that you connect the power cable from the power supply to
the ATX4P connector to ensure system stability.
SYS_FAN1/2/3:
Pin No. Denition
1 GND
2 Speed Control
3 Sense
4 VCC
SYS_FAN2/3
1
DEBUG
PORT
G.QBOFM
1
CPU_FAN