Gigabyte GA-P67A-UD5-B3, User Manual, Page: 22 / 116

Hardware Installation - 22 -
1-8 Onboard LEDs and Switches
CPU VTT Phase Indicator LEDs
This motherboard contains 2 phase indicator LEDs controlled by the system BIOS to indicate the phase
status of the CPU VTT. The green LEDs light up under normal working conditions; the yellow LEDs will be il-
luminated when an excessive overvoltage or overloading occurs.
Diagnostic LEDs
This motherboard has 6 onboard LEDs controlled by the system BIOS. The 6 LEDs indicate if a component
(including CPU and memory) or a device (including PCI and PCIe cards and SATA devices) works abnor-
mally. The LEDs will light up during the POST when the components/devices have a problem.
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.
CPU VTT:
GD1:
Normal working conditions (green LED)
GD2: Excessive overvoltage or overloading (yellow LED)
CPU: CPU_LED
Memory: DIMM_LED
SATA: SA_LED
PCIe x16/x8: PE_LED
PCIe x4/x1: PE1_LED
PCI: PCI_LED
ACPI LEDs:
S4_S5_LED
S3_LED
S1_LED
S0_LED