Asus Maximus IV Extreme, User Manual, Page: 52 / 186

2.2.7 Onboard LEDs
The motherboard comes with a set of LEDs that indicate the voltage conditions of CPU,
memory, northbridge and southbridge. You may adjust the voltages in BIOS. There are
also an LED for hard disk drive activity and an onboard switch for power status. For
more information about voltage adjustment, refer to 3.3 Extreme Tweaker menu .
1. CPU LED
The CPU LED has four voltage displays: CPU Voltage, VCCSA, VCCIO, and
CPU PLL Voltage; you can select the voltage to display in BIOS. Refer to the
illustration below for the location of the CPU LED and the table below for LED
definition.
2. Memory LED
The Memory LED has one voltage display: DRAM Voltage. Refer to the
illustration below for the location of the memory LED and the table below for
LED definition.
3. PCH LED
PCH LED has two different voltage displays: PCH Voltage and PCH PLL
Voltage. Refer to the illustration below for the location of the PCH LED and
the table below for LED definition.
Normal (blue) High (yellow) Crazy (red)
CPU Voltage
(default)
0.8–1.4 1.40500–1.55 1.55500–by CPU
VCCSA Voltage 0.8–1.1 1.10625–1.2 1.20625–by CPU
VCCIO Voltage 0.8–1.15 1.15625–1.25 –1.25 1.25625–by CPU
CPU PLL Voltage 1.2–2.0 2.00625–2.1 2.10625–by CPU
2-20 Chapter 2: Hardware information