Gigabyte GA-970A-D3 Manual - Page 23

/5 CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN Fan Headers, CLR_CMOS Clearing CMOS Jumper - reset cmos

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Page 23 highlights

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 3-pin (SYS_FAN2) and a 4-pin (SYS_ FAN1) 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 recom- mended that a system fan be installed inside the chassis. CPU_FAN: Pin No. Definition 1 GND 1 2 +12V /Speed Control CPU_FAN 3 Sense 4 Speed Control SYS_FAN1: Pin No. Definition 1 GND 1 SYS_FAN1 2 +12V /Speed Control 3 Sense 4 Reserve 1 1 SYS_FAN2 PWR_FAN SYS_FAN2/PWR_FAN: Pin No. Definition 1 GND 2 +12V 3 Sense •• 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. 6) CLR_CMOS (Clearing CMOS Jumper) Use this jumper to clear the CMOS values (e.g. date information and BIOS configurations) and reset the CMOS values to factory defaults. To clear the CMOS values, place a jumper cap on the two pins to temporarily short the two pins or use a metal object like a screwdriver to touch the two pins for a few seconds. Open: Normal Short: Clear CMOS Values •• Always turn off your computer and unplug the power cord from the power outlet before clearing the CMOS values. •• After clearing the CMOS values and before turning on your computer, be sure to remove the jumper cap from the jumper. Failure to do so may cause damage to the motherboard. •• After system restart, go to BIOS Setup to load factory defaults (select Load Optimized Defaults) or manually configure the BIOS settings (refer to Chapter 2, "BIOS Setup," for BIOS configurations). - 23 - Hardware Installation

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- 23 -
Hardware Installation
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 3-pin (SYS_FAN2) and a 4-pin (SYS_
FAN1) 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 recom-
mended that a system fan be installed inside the chassis.
1
CPU_FAN
SYS_FAN1
PWR_FAN
SYS_FAN2
1
1
1
CPU_FAN:
SYS_FAN1:
SYS_FAN2/PWR_FAN:
Pin No.
Definition
1
GND
2
+12V /Speed Control
3
Sense
4
Speed Control
Pin No.
Definition
1
GND
2
+12V /Speed Control
3
Sense
4
Reserve
Pin No.
Definition
1
GND
2
+12V
3
Sense
6)
CLR_CMOS (Clearing CMOS Jumper)
Use this jumper to clear the CMOS values (e.g. date information and BIOS configurations) and reset
the CMOS values to factory defaults. To clear the CMOS values, place a jumper cap on the two pins to
temporarily short the two pins or use a metal object like a screwdriver to touch 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. Over-
•
heating 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.
•
Always turn off your computer and unplug the power cord from the power outlet before clearing the CMOS
•
values.
After clearing the CMOS values and before turning on your computer, be sure to remove the jumper cap
•
from the jumper. Failure to do so may cause damage to the motherboard.
After system restart, go to BIOS Setup to load factory defaults (select Load Optimized Defaults) or manually
•
configure the BIOS settings (refer to Chapter 2, "BIOS Setup," for BIOS configurations).