ASUS CROSSHAIR IV Formula Motherboard Review :: BIOS and Overclocking

06-02-2010 · Category: Motherboards

By Benjamin Sun

ASUS uses a modified American Megatrends AMIBIOS on their Crosshair IV Formula motherboard. The top menu is split into Extreme Tweaker, Main, Advanced, Power, Boot, and Tools menus. The Main menu has the system date, language, time, storage configuration, and system information submenus. The Storage configuration is where the RAID is set.

ASUS CROSSHAIR IV Formula Motherboard Review Battery

Battery

The Extreme Tweaker menu is where the overclocking of the board is done. As a ROG board it has several manual and automatic overclocking abilities. CPU Level Up allows the CPU to be set at settings for a higher CPU than is installed. This is dependent on the specific CPU installed at the time. The OC Tuner utility automatically overclocks the frequency and voltage of the CPU and DRAM. It takes about five minutes. Ai Overclock gives you a slew of choices for overclocking including Manual, Auto, DOCP which changes the settings based upon the DRAM O.C. profile and CPU Level Up. Here’s a chart with the various settings available:

RAS# ACT Time
Setting Range
CPU Bus Frequency 100-600
PCIE Frequency 100-150
DRAM O.C. Profile DDR3 1600MHz, DDR3-1800MHz, DDR3-1866MHz, DDR3-2000MHz
CPU Ratio Depends on CPU
DRAM Frequency Depends on CPU Bus Frequency
CPU/NB Frequency 1200MHz, 1400MHz, 1600MHz, 1800MHz, 2000MHz
HT Link 200, 400, 600, 800,1000, 1200, 1400, 1600, 1800, 2000MHz
DRAM CAS 4-12CLK
RAS# to CAS# Delay 5-12CLK
RAS# PRE Time 5-12CLK
15-30CLK
READ to PRE Time 4, 5,6,7 CLK
Row Cycle Time 11-41CLK
Write Recovery Time 5CLK, 6 CLK, 7 CLK, 8 CLK, 10 CLK, 12 CLK
RAS# to RAS# Delay 4CLK, 5CLK, 6 CLK, 7 CLK
READ to WRITE Delay 3-17CLK
WRITE to READ Delay (DD) 2-10CLK
WRITE to READ Delay (SD) 4,5,6, 7 CLK
WRITE to WRITE Timing 3-10CLK
READ to READ Timing 3-10CLK
DRAM REF Cycle TIME 90ns, 110ns,160ns, 300ns, 350ns
DRAM Refresh Rate Every 7.8ms, every 3.9ms
DRAM Command RATE 1T, 2T
DRAM Driving Configuration 1x, 1.25x, 1.5x, 2x
CS/ODT drive strength 1x, 1.25x, 1.5x, 2x
ADDR/CMD drive strength 1x, 1.25x, 1.5x, 2x
MEMCLK drive strength 0.75x, 1x, 1.25x, 1.5x
Data drive strength 0.75x, 1x, 1.25x, 1.5x
DQS drive strength 0.75x, 1x, 1.25x, 1.5x
Processor ODT 240ohms +/- 20%, 120ohms +/- 20%, 60ohms +/- 20%
CPU Offset Voltage 0.006250v-0.700000v
CPU VDDA Voltage 1.20000V-2.90000V
DRAM Voltage 1.20000v-2.90000v
HT Voltage 0.80000v-2.0000v
NB Voltage 0.80000v-2.0000v
NB 1.8V Voltage 1.802000v-3.007750v
SB Voltage 1.113000V-1.802000V
VDDR Voltage 1.205750v-1.802000v
VDDPCIE Voltage1.113000v-2.000750v
DRAM CTRL REF Voltage 0.395x-0.630x
DRAM DATA REF Voltage 0.395x-0.630x

Bios Screenshots


ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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ASUS CROSSHAIR IV Formula Motherboard Review BIOS shots

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