Asus CROSSHAIR IV FORMULA User Guide - Page 28

Onboard LEDs, Northbridge/Southbridge LEDs, 3 Extreme Tweaker, CPU LED, Memory LED

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Onboard LEDs The motherboard comes with 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 three voltage displays: CPU Voltage, VDDNB, and VDDA Voltage; you can select the voltage to display in BIOS. Refer to the illustration on the next page for the location of the CPU LED and the table below for LED definition. CPU Voltage (default) VDD NB VDDA 2.5 Voltage Normal (green) By CPU-1.3625 By CPU-1.3625 2.20000-2.76250 High (yellow) 1.3750-1.4875 1.3750-1.4875 2.77500-3.00000 Crazy (red) 1.5000-By CPU 1.5000-By CPU 3.01250-3.18750 2. Northbridge/Southbridge LEDs The northbridge and southbridge LEDs each have two different voltage displays. The northbridge LED displays either the NB Voltage or the NB 1.8 Voltage. The southbridge LED shows either the SB Voltage, SB 1.2V Voltage, or the HT. You can select the voltage to display in BIOS. Refer to the illustration on the next page for the location of the northbridge/southbridge LEDs and the table below for LED definition. NB 1.1 Voltage NB 1.8 Voltage VDDPCIE 1.1V SB 1.1 Voltage SB HT 1.2 Voltage Normal (green) 0.80000-1.58750 1.80200-1.89475 1.11300-1.59000 1.11300-1.44250 0.80000-1.38750 High (yellow) 1.60000-1.83750 1.90800-1.94775 1.60325-1.84175 1.45750-1.69600 1.40000-1.65000 Crazy (red) 1.85000-2.00000 1.96100-3.00775 1.85500-2.00075 1.70925-1.80200 1.66250-2.00000 3. Memory LED Refer to the illustration on the next page for the location of the memory LED and the table below for LED definition. DRAM Bus Voltage VDDR 1.2 Voltage Normal (green) 1.20000-1.72500 1.20575-1.39125 High (yellow) 1.73750-2.32500 1.40450-1.65625 Crazy (red) 2.33750-2.90000 1.66950-1.80200 2-2 Chapter 2: Hardware information

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2.
Northbridge/Southbridge LEDs
The northbridge and southbridge LEDs each have two different voltage
displays. The northbridge LED displays either the NB Voltage or the NB
1.8 Voltage. The southbridge LED shows either the SB Voltage, SB 1.2V
Voltage, or the HT. You can select the voltage to display in BIOS. Refer to the
illustration on the next page for the location of the northbridge/southbridge
LEDs and the table below for LED definition.
Normal (green)
High (yellow)
Crazy (red)
NB 1.1 Voltage
0.80000–1.58750
1.60000–1.83750
1.85000–2.00000
NB 1.8 Voltage
1.80200–1.89475
1.90800–1.94775
1.96100–3.00775
VDDPCIE 1.1V
1.11300–1.59000
1.60325–1.84175
1.85500–2.00075
SB 1.1 Voltage
1.11300–1.44250
1.45750–1.69600
1.70925–1.80200
SB HT 1.2 Voltage
0.80000–1.38750
1.40000–1.65000
1.66250–2.00000
Onboard LEDs
The motherboard comes with 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.
Normal (green)
High (yellow)
Crazy (red)
CPU Voltage (default)
By CPU–1.3625
1.3750–1.4875
1.5000–By CPU
VDD NB
By CPU–1.3625
1.3750–1.4875
1.5000–By CPU
VDDA 2.5 Voltage
2.20000–2.76250
2.77500–3.00000
3.01250–3.18750
1.
CPU LED
The CPU LED has three voltage displays: CPU Voltage, VDDNB, and VDDA
Voltage; you can select the voltage to display in BIOS. Refer to the illustration
on the next page for the location of the CPU LED and the table below for LED
definition.
3.
Memory LED
Refer to the illustration on the next page for the location of the memory LED
and the table below for LED definition.
Normal (green)
High (yellow)
Crazy (red)
DRAM Bus Voltage
1.20000–1.72500
1.73750–2.32500
2.33750–2.90000
VDDR 1.2 Voltage
1.20575–1.39125
1.40450–1.65625
1.66950–1.80200
2-2
Chapter 2: Hardware information