Asus AP1720-E2 AP1720-E2 English version manual - Page 102

13. CPU and system fan connectors (4-pin CPU_FAN1/2, 3-pin REAR_FAN1/2, 3-pin FRNT_FAN1/2) The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a total of 2.1A~4.44A (53.28W max.) at +12V. Connect the fan cables to the fan connectors on the motherboard, making sure that the black wire of each cable matches the ground pin of the connector. The CPU fan connectors support either a 3-pin or a 4-pin fan cable plug. Both connectors are slotted to ensure connection in correct orientation. REAR_FAN1 CPU_FAN1 CPU_FAN2 CPU_FAN1 GND FAN Power FAN Speed PWM Control CPU_FAN2 REAR_FAN1 Rotation +12V GND REAR_FAN2 Rotation +12V GND PWM Control FAN Speed FAN Power GND NCCH-DL ® REAR_FAN2 FRNT_FAN1 FRNT_FAN2 NCCH-DL Fan connectors FRNT_FAN1 FRNT_FAN2 Rotation +12V GND Rotation +12V GND Do not forget to connect the fan cables to the fan connectors. Lack of sufficient air flow within the system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps on the fan connectors! 14. System panel connector (20-pin PANEL1) This connector accommodates several system front panel functions. KEYLOCK PLED SPKR PLED+ LAN_LINK PLEDKeylock Ground +5V HD_LED+ HD_LEDSpeaker NCCH-DL ® LAN_ACT +5VSB MLED ExtSMI# Ground PWR Ground Reset Ground NCCH-DL System panel connector MLED RESET SMI PWR_SW 4-14 Chapter 4: Motherboard info