Gigabyte GA-Z77X-UD4H User Manual page 26

3) ATX4P1 (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 SATA power cable from the power supply
1
to the ATX4P1 connector to ensure system stability.
1
4/5) CPU_FAN/SYS_FAN1/SYS_FAN2/SYS_FAN3/SYS_FAN4 (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.
SYS_FAN2/3:
Pin No. Definition
1
1
SYS_FAN2
2
1
3
4
SYS_FAN3
• 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.
• These fan headers are not configuration jumper blocks. Do not place a jumper cap on the headers.
Hardware Installation
DIP
1 2 3
3 2 1
DIP
1
15
SYS_FAN1
GND
1
+12V
Sense
SYS_FAN4
Speed Control
- 26 -
Pin No. Definition
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CPU_FAN:
Pin No. Definition
1 GND
2 +12V /Speed Control
3 Sense
CPU_FAN
4 Speed Control
SYS_FAN1:
Pin No. Definition
1 GND
2 Speed Control
1
3 Sense
4 Reserve
SYS_FAN4:
Pin No. Definition
1 GND
2 +12V
3 Sense
4 Reserve
NC
NC
NC
GND
GND
GND
VCC
VCC
VCC
GND
GND
GND
+12V
+12V
+12V