We’ve already seen ASUS EFI BIOS, a very successful implementation of the UEFI standard (Unified Extensible Firmware Interface), in our previous reviews of ASUS mainboards. By default the BIOS opens up in EZ Mode which gives you a lot of information but offers almost no user-defined options. You can only learn some basic system specs and monitor a few parameters, choose between high-performance and energy-saving operation modes, and define the boot device order by dragging the icons with your mouse.
Recently the option of quickly leaving the limited EZ Mode has been added: you can press F3 and select the BIOS section you need from the list.
You can press F3 every time you enter the BIOS (by the way, the hot button works in the other BIOS sections as well), yet it may be easier to make the BIOS open in Advanced Mode. In this case you will see the familiar Main section where you can see basic system information, change the interface language and set up date and time.
Most of the overclocking-related options are collected in the Ai Tweaker section. In the main screen you can change frequencies, multipliers and voltages. You don’t have to move to the monitoring section to check out the current levels of voltages as they are shown right next to each voltage-affecting parameter.
Some of the setup options are available in individual subsections in order not to clutter the main section. One such subsection contains memory timings, for example. The OCTuner parameter looks like a subsection but is actually used to overclock the computer automatically. If you want to quickly overclock your CPU, you can just press F6 to evoke the ASUS Ratio Boost feature. It increases the CPU frequency multiplier to the maximum value permitted by the Intel Turbo Boost technology while keeping all the power-saving technologies up and running. There is a separate page for memory timings. There are a lot of options here, yet they are quite easy to use. You can see all the timings set up by the mainboard for each of the four memory channels. You can adjust some of them, leaving the others at their defaults.
There are a lot of new options which are mostly related to power supply and the new digital power system called DIGI+. You can control ASUS’s exclusive power-saving technologies right here. One of them allows changing the number of active phases in the CPU voltage regulator depending on load. CPU Load Line Calibration can now be not only enabled or disabled but also set to a certain level (it helps counteract the voltage drop occurring on the CPU under load).
The CPU Performance Settings help you fine-tune the Turbo technology but the mainboard sets them correctly by default depending on CPU parameters you have selected.
The options of the Advanced section should be familiar to you and their names are self-descriptive.
The CPU Configuration subsection reports you basic information about the CPU and allows to control some CPU-related technologies.