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. The P8Z77-V Deluxe differs but in some minor details in its BIOS capabilities.
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.
There are a couple of hot buttons available. You can press F3 and select the BIOS section you need from the list. And you can press F7 to quickly switch from EZ into Advanced Mode.
You can press F3 every time you enter the BIOS (by the way, this hot button works in the other BIOS sections as well), yet it may be easier to make the BIOS open in Advanced Mode by default. In this case you will see the familiar Main section where you can read some 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.
Earlier it was easy to overlook the ASUS Ratio Boost feature which could be evoked by pressing F6 to fix the CPU frequency multiplier at its maximum permitted by the Intel Turbo Boost technology irrespective of load. Now we've got the conspicuous option ASUS MultiCore Enhancement which does the same. It's in the list next to the rest of settings.
Some of the setup options are available in individual subsections in order not to clutter the main section. The OCTuner parameter looks like a subsection but is actually used to overclock the computer automatically. 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 two memory channels. You can adjust just some of them, leaving the others at their defaults.
The CPU Performance Settings section has been renamed as CPU Power Management, which is more appropriate. It helps you fine-tune Intel Turbo Boost parameters but you can hardly need to do that since the mainboard sets them correctly by default, depending on CPU parameters you have selected.
There are quite a lot of options related to power supply and the new digital power system called DIGI+. You can control ASUS’s exclusive power-saving technologies right here, in the BIOS. 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 options of the Advanced section should be familiar to you and their names are self-descriptive. Let’s take a look at each of its subsections, though.
The CPU Configuration subsection reports you basic information about the CPU and allows to control some CPU-related technologies.
Power-saving technologies can be managed on the CPU Power Management Configuration page.
The PCH Configuration subsection is for enabling/disabling Intel Rapid Start and Intel Smart Connect technologies.
The SATA Configuration subsection lists SATA drives connected to the mainboard.
The System Agent Configuration subsection gives you access to Graphics Configuration and NB PCIe Configuration pages.