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ASUS H87-PRO
1-23
Chapter 1
• System power LED (2-pin PWR_LED)
This 2-pin connector is for the system power LED. Connect the chassis power LED
cable to this connector. The system power LED lights up when you turn on the system
power, and blinks when the system is in sleep mode.
• Hard disk drive activity LED (2-pin HDD_LED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable
to this connector. The HDD LED lights up or ashes when data is read from or written
to the HDD.
• System warning speaker (4-pin SPEAKER)
This 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you to hear system beeps and warnings.
• ATX power button/soft-off button (2-pin PWR_SW)
This connector is for the system power button. Pressing the power button turns
the system on or puts the system in sleep or soft-off mode depending on the BIOS
settings. Pressing the power switch for more than four seconds while the system is ON
turns the system OFF.
• Reset button (2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot without
turning off the system power.
9. System panel connector (20-8 pin PANEL)
This connector supports several chassis-mounted functions.
H87-PRO
H87-PRO System panel connector
PIN 1
* Requires an ATX power supply
PWR_LED
SPEAKER
PWR_LED
PWR_LED
+5V
Ground
Ground
Speaker
HDD_LED
HDD_LED
PWR
Ground
Reset
Ground
PANEL
HDD_LED PWR_SW RESET