User`s manual

FAN Speed Headers

SYSTEM FAN

CPU FAN

(4) Front Panel Headers (16-pin): (CN21)

(5) PC-Speaker connector: (CN21 1,7)

This 2-pin connector connects to the case-mounted speaker.

(6) IDE Activity LED: IDE LED CN21 (9,11)

This connector connects to the hard disk activity indicator light on the case.

(7) Reset switch lead: RESET CN21 (13-15)

This 2-pin connector connects to the case-mounted reset switch for rebooting your

computer without having to turn off your power switch. This is a preferred method

of rebooting in order to prolong the lift of the system’s power supply. See the

figure below.

(8) Power LED CN21 (2,6)

The Power LED is light on while the system power is on. Connect the Power LED

from the system case to this pin.

(9) Power switch: PWR BTN CN21 (14-16)

This 2-pin connector connects to the case-mounted power switch to power

ON/OFF the system.

(10) FAN Speed Headers (3-pin): CPU Fan , System Fan

These connectors support cooling fans, depending on the fan manufacturer, the

wire and plug may be different. The red wire should be positive, while the black

should be ground.

Signal Pin# Pin# Signal

5V 1 2 5V

NC 3 4 NC

Buzz (NC) 5 6 GND

SPKR 7 8 KBLOCK

5V 9 10 GND

HDDLED- 11 12 NC

RESET+ 13 14 5V

GND 15 16 PWRBT-

Front Panel Connector

Pin 1

2 16