GIGABYTE GA-MA790XT-UD4P - Manual (Page 25)

Hardware Installation - 25 -
3/4/5) 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 two 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 motherboard supports CPU fan speed
control, which requires the use of a CPU fan with fan speed control design. For optimum heat
dissipation, it is recommended that a system fan be installed inside the chassis.
Pin No. Definition
1 GND
2 +12V / Speed Control
3 Sense
4 Speed Control
CPU_FAN:
Pin No. Definition
1 GND
2 +12V / Speed Control
3 Sense
4 Reserve
SYS_FAN1:
•
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.
Pin No. Definition
1 GND
2 +12V
3 Sense
SYS_FAN2/PWR_FAN:
6) FDD (Floppy Disk Drive Connector)
This connector is used to connect a floppy disk drive. The types of floppy disk drives supported
are: 360 KB, 720 KB, 1.2 MB, 1.44 MB, and 2.88 MB. Before connecting a floppy disk drive, be
sure to locate pin 1 of the connector and the floppy disk drive cable. The pin 1 of the cable is
typically designated by a stripe of different color.
1
2
33
34
1
CPU_FAN
1
SYS_FAN1
PWR_FAN
SYS_FAN2
1
1