ASRock 2Core1333-2.66G Quick Installation Guide - Page 17
CPU Fan Connector
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F. Enter Windows system. Click the icon on the lower right hand taskbar to enter Realtek HD Audio Manager. Click "Audio I/O", select "Connector Settings" , choose "Disable front panel jack detection", and save the change by clicking "OK". System Panel Header (9-pin PANEL1) (see p.2 No. 13) This header accommodates several system front panel functions. Chassis Speaker Header (4-pin SPEAKER 1) (see p.2 No. 15) Please connect the chassis speaker to this header. Chassis Fan Connector (3-pin CHA_FAN1) (see p.2 No. 16) Please connect a chassis fan cable to this connector and match the black wire to the ground pin. CPU Fan Connector (4-pin CPU_FAN1) (see p.2 No. 3) 1 2 3 4 Please connect a CPU fan cable to this connector and match the black wire to the ground pin. Though this motherboard provides 4-Pin CPU fan (Quiet Fan) support, the 3-Pin CPU fan still can work successfully even without the fan speed control function. If you plan to connect the 3-Pin CPU fan to the CPU fan connector on this motherboard, please connect it to Pin 1-3. Pin 1-3 Connected 3-Pin Fan Installation ATX Power Connector (20-pin ATXPWR1) (see p.2 No. 26) Please connect an ATX power supply to this connector. ATX 12V Connector (4-pin ATX12V1) (see p.2 No. 2) Please note that it is necessary to connect a power supply with ATX 12V plug to this connector so that it can provides sufficient power. Failing to do so will cause the failure to power up. 17 ASRock 2Core1333-2.66G Motherboard English