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Hardware Installation
1-8 Onboard LEDs and Buttons
Diagnostic LEDs
This motherboard has 7 onboard LEDs controlled by the system BIOS. The 7 LEDs indicate if a component
(including CPU and memory) or a device (including PCI and PCIe cards and IDE/SATA devices) works abnor-
mally. The LEDs will light up during the POST when the components/devices have a problem.
CPU:
CPU_LED
Memory:
DIMM_LED
IDE:
IDE_LED
SATA:
SA_LED
PCIe x16/x8:
PE_LED
PCIe x4/x1:
PE1_LED
PCI:
PCI_LED
ACPI LEDs
The 4 embedded ACPI LEDs indicate the system power status (S0, S1, S3, S4, S5) to prevent potential hard-
ware damage due to improper plug/unplug actions.
ACPI LEDs:
S4_S5_LED
S3_LED
S1_LED
S0_LED
CPU VTT/Memory Phase Indicator LEDs
This motherboard contains 4 phase indicator LEDs controlled by the system BIOS to indicate the phase sta-
tus of the CPU VTT and memory. The green LEDs light up under normal working conditions; the yellow LEDs
will be illuminated when an excessive overvoltage or overloading occurs.
CPU VTT:
GD1:
Normal working conditions (green LED)
GD2:
Excessive overvoltage or overloading (yellow LED)
Memory:
MD1:
Normal working conditions (green LED)
MD2:
Excessive overvoltage or overloading (yellow LED)