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ASUS uses the American Megatrends AMIBIOS modified for their purposes on virtually every ASUS motherboard sold on the market. The menu bar on top is split into: Main, Ai Tweaker, Advanced, Power, Boot, Tools and Exit. The Main menu is where the Time, Date, Language, drive detection, Storage Configuration and System Information is set.
 Battery
The Advanced menu is where the CPU Configuration, Chipset configuration, Onboard Devices configuration, USB Configuration and PCIPnP settings are set. The CPU Settings menu is where the CIE Support, the Ratio setting, the Max CPUID Value Limit, Intel Virtualization Technology, CPU Function, Execute Disable Bit, SpeedStep and C-State Tech are set. The Onboard Device Configuration is where you enable the High Definition Audio, other JMicron ESATA/PATA controller, LAN and Firewire. The Ai Tweaker menu is where you set the various overclocking settings on the board. The Ai Overclock Tuner allows you to either overclock manually or automatically. If it is set to auto, the FSB Frequency and PCIE Frequency can be changed. The range of settings available is vast so I compiled the tweaks into a chart that follows:
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Setting |
Range
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FSB Frequency |
200-800
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PCIE Frequency |
100-180
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FSB Strap to NB |
Auto, 200, 266, 333, 400MHz
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DRAM Frequency |
Varies with FSB Frequency
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CAS# Latency |
(5 is default) 3, 4-11 DRAM Clocks
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DRAM RAS# to CAS# Delay |
(5 default) 3, 4-18 DRAM Clocks
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DRAM RAS# Precharge |
(5 default) 3, 4-18 DRAM Clocks
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DRAM RAS# Activate to Precharge time |
(15 default) 3,4-34 DRAM Clocks
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RAS# to RAS# Delay |
Auto, 1-15 DRAM Clocks
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Row Refresh Cycle Time |
Auto, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 85, 105, 132 DRAM Clocks
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Write Recovery Time |
Auto, 1-15 DRAM Clocks
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Read to Precharge time |
Auto, 1-15 DRAM Clocks
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CPU Voltage |
0.8500V-2.10000V in 0.00625V increments
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CPU GTL Reference |
Auto, 0.65x, 0.63x, 0.61x
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CPU PLL Voltage |
1.50v-2.78v in 0.02v increments
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FSB Termination voltage |
1.20v-1.90v in 0.02v increments
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DRAM Voltage |
1.80v-3.08v in 0.02v increments
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NB Voltage |
1.10v-1.90v in 0.02v increments
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SB Voltage |
1.10v-1.40v
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PCIE SATA Voltage |
1.50v-1.80v in 0.02v increments
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BIOS Shots
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