ASRock 775i915PL-SATA2 User Manual - Page 21

System Panel Header (9-pin PANEL1) (see p.9 No. 18) Chassis Speaker Header (4-pin SPEAKER 1) (see p.9 No. 16) Chassis Fan Connector (3-pin CHA_FAN1) (see p.9 No. 17) CPU Fan Connector (4-pin CPU_FAN1) (see p.9 No. 5) ATX Power Connector (20-pin ATXPWR1) (see p.9 No. 36) PLED+ PLEDPWRBTN# GND 1 DUMMY RESET# GND HDLEDHDLED+ 1 SPEAKER DUMMY DUMMY +5V This header accommodates several system front panel functions. Please connect the chassis speaker to this header. GND +12V CHA_FAN_SPEED Please connect a chassis fan cable to this connector and match the black wire to the ground pin. GND +12V CPU_FAN_SPEED FAN_SPEED_CONTROL Please connect a CPU fan cable to this connector and match the black wire to the ground pin. Please connect an ATX power supply to this connector. ATX 12V Connector (4-pin ATX12V1) (see p.9 No. 2) SLI Power Connector (4-pin SLI_POWER1) (see p.9 No. 34) Please connect an ATX 12V power supply to this connector. SLI POWER_1 It is not necessary to use this connector, but please connect it with a hard disk power connecor when two graphics cards are plugged to this motherboard at the same time. 21