Gigabyte W480 VISION D User Manual page 36

21) CPU/DRAM/VGA/BOOT (Status LEDs)
The status LEDs show whether the CPU, memory, graphics card, and operating system are working
properly after system power-on. If the CPU/DRAM/VGA LED is on, that means the corresponding device
is not working normally; if the BOOT LED is on, that means you haven't entered the operating system yet.
B_
Hardware Installation
USB 0_ B
CPU: CPU status LED
DRAM: Memory status LED
VGA: Graphics card status LED
CPU DRAM
BOOT: Operating system status LED
VGA BOOT
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B_
F_USB3 F_USB30 3