Gigabyte GA-990FXA-UD7 Manual - Page 25

F_PANEL(NH) 3) ATX4P (PCIe Power Connector) PWM Switch (X58A-OC) BIOS Switcher (X58A-OC) 1 The power connector provides auxiliary power to the onboard PCI Express x16 slots. When two or more graphics cards are to be installed, we recomDIPmend that you connect the SATA power cable from the power supply to the ATX4P connector to1 2 3ensure system stability. DIP 1 23 PCIe power connector (SATA)(X58A-OC) DIP 1 23 1 DIP 1 23 1 1 Voltage measurement module(X58A-OC) DB_PORT Pin No. Definition 1 NC 2 NC 3 NC 1 4 GND 5 GND 6 GND 15 7 VCC 8 VCC 9 VCC 10 GND 11 GND 12 GND 13 +12V 14 +12V 15 +12V F_AUDIO(H) F_USB30 TPM w/housing 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_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 recommended 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 SYS_FAN2/PWR_FAN: Pin No. Definition 1 1 SYS_FAN2 PWR_FAN 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. - 25 - Hardware Installation