2 . CPU fan pin selection (3-pin FM_CPU1, FM_CPU2)

These jumpers allow you to connect either a 3-pin or a 4-pin CPU fan cable plug to the CPU fan connectors (CPU_FAN1, CPU_FAN2). Set these jumpers to pins 1-2 if you are using a 3-pin fan cable plug, or to pins 2-3 if you are using a 4-pin plug.

NCCH-DR

FM_CPU2

 

3

2

2

1

 

DC mode

PWM

(Default)

 

FM_CPU1

1

2

2

3

DC mode

PWM

(Default)

 

 

NCCH-DR FM_CPU Setting

3 . USB device wake-up (3-pin USBPW12, USBPW34)

Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped, DRAM refreshed, system running in low power mode) using the connected USB devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU, DRAM in slow refresh, power supply in reduced power mode).

USBPW12

1

2

2

3

 

+5V

+5VSB

(Default)

 

 

 

USBPW34

 

1

2

2

3

NCCH-DR

+5V

+5VSB

(Default)

 

 

NCCH-DR USB device wake-up

• The USB device wake-up feature requires a power supply that can provide 500mA on the +5VSB lead for each USB port; otherwise, the system would not power up.

•The total current consumed must NOT exceed the power supply capability (+5VSB) whether under normal condition or in sleep mode.

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Chapter 2: Hardware information