Gigabyte GA-P35-DS4 Manual - Page 26
NB_FAN North Bridge Fan Header, 5/6 CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN Fan Headers - cpu support
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English 4/5/6) 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_FAN1) and a 4-pin (SYS_FAN2) system fan headers, and a 3-pin power fan header (PWR_FAN). Each fan header supplies a +12V power voltage and possesses a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation. Most fans are designed with color-coded power connector wires. A red power connector wire indicates a positive connection and requires a +12V voltage. 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. CPU_FAN: 1 Pin No. Definition 1 GND 1 2 +12V/Speed Control 3 Sense CPU_FAN SYS_FAN2 4 Speed Control 1 SYS_FAN1 1 PWR_FAN SYS_FAN2: Pin No. 1 2 3 4 Definition GND Speed Control Sense +5V SYS_FAN1 / PWR_FAN: Pin No. Definition 1 GND 2 +12V 7) NB_FAN (North Bridge Fan Header) 3 Sense Connect the North Bridge fan cable to this header. The fan header has a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation. Most fans are designed with color-coded power connector wires. A red power connector wire indicates a positive connec- tion and requires a +12V voltage. The black connector wire is the ground wire. Pin No. Definition 1 1 GND 2 +12V 3 NC • Be sure to connect fan cables to the fan headers to prevent your CPU, North Bridge and system from overheating. Overheating may result in damage to the CPU/North Bridge or the system may hang. • These fan headers are not configuration jumper blocks. Do not place a jumper cap on the headers. GA-P35-DS4 Motherboard - 26 -