Gigabyte GA-P55-UD3R User Manual page 31

20) PHASE LED
The number of lighted LEDs indicates the CPU loading. The higher the CPU loading, the more the
number of lighted LEDs. To enable the Phase LED display function, please first enable Dynamic Energy
Saver 2. Refer to Chapter 4, "Dynamic Energy Saver 2," for more details.
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- 31 - Hardware Installation