SOYO ETEQ82C663 AGP - Manual (Page 30)

Hardware Setup SY-5EHM/5EH5 V1.3
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3. Speaker
Attach the 4-pin PC speaker cable from the case to the Speaker
connector on the Motherboard.
4. Turbo LED
Connecting the 2-pin Turbo LED cable to the corresponding Turbo
LED connector will cause the LED to light whenever the system is
in Turbo mode.
The manufacturer has permanently set this Motherboard in Turbo
mode due to most hardware and software compliance to turbo
mode.
5. IDE LED
Attach the 2-pin IDE device LED cable to the corresponding IDE
LED connector on the Motherboard. This will cause the LED to
lighten when an IDE (HDD, CD-ROM) device is active.
6. ATX Power On/Off Switch
Attach the 2-pin momentary type switch to the PWRBT connector
for turning On or Off your ATX power supply.