Asus Maximus IV Extreme-Z - Manual (Page 53)

4. Hard Disk LED
The hard disk LED is designed to indicate the hard disk activity. It blinks when
data is being written into or read from the hard disk drive. The LED does not
light up when there is no hard disk drive connected to the motherboard or
when the hard disk drive does not function.
Normal (blue) High (yellow) Crazy (red)
DRAM Voltage 1.2–1.6 –1.6 1.60625–1.8 1.80625–by CPU
Normal (blue) High (yellow) Crazy (red)
PCH Voltage 0.80825–1.15275 –1.15275 1.166–1.20575 1.219–by CPU
PCH PLL Voltage 0.80825–1.15275 –1.15275 1.166–1.20575 1.219–by CPU
ASUS Maximus IV Extreme-Z 2-21