The ASUS UEFI BIOS are by far one of the most effective and clean UEFI BIOS that have come across the Legit Reviews test bench so far. When you first boot up either of the ASUS Republic of Gamers motherboards you are presented with the Extreme Tweaker page within the Advanced mode. Here we have, or can jump to all of the pages that we will need for overclocking. The first option on the Extreme Tweaker page is the CPU Level Up. You can set you Intel Core processor to either 4.2GHz or 4.6GHz. Beleow the CPU Level Up feature we can manually set the Bclk, Maximum Turbo ratio, Memory Frequency, as well as the iGPU Max Frequency. This particualar shot is from the ASUS Maximus IV Extreme-Z. If you remember back to the layout page, there is no video out on the Extreme-Z, yet we can still tweak the iGPU!
Scrolling down the Extreme Tweaker page we can see the sub-pages for the DRAM Timing, GPU DIMM Post, CPU Performance Settings, as well as the DIGI+ VRM/Power control. Below the selection of sub-pages we begin to see our Voltage Options. The ASUS Maximus IV Extreme-Z and the ASUS Maximus IV Gene-Z should has enough voltage options for any level of overclocker out there.
Above we can see the remaining Voltage options on the Extreme Tweaker page.
Above you can check out the DRAM Timing Control page.
The GPU.DIMM post page shows us the GPU’s installed into the system as well as the basic memory information. The Gene-Z
The CPU Performance Settings page will let you adjust the CPU ratio as well as the power settings of the motherboards.
The second page of the ASUS UEFI BIOS is the “Main” page. Here we can find the information on the BIOS as well as some basic information about the processor and memory.
The advanced page gives us access to several of the sub-pages which include CPU Configuration, System Agent Configuration, PCH Configuration, SATA Configuration, USB, Onboard Devices, APM, iROG, ROG Connect, and LED Control.
Once again we have another spot that we can tweak the CPU Ratio on the ASUS Maximus IV series motherboards. We can also enable/disable features like the Intel Adaptive Thermal Monitor, and Limit CPUID Maximum.
If yo are looking for the iGPU BIOS options they can be found on the System Agent Configuration page.
Here we can set our SATA drives between IDE, AHCI, or RAID modes.
The ASUS Maximus IV Extreme-Z and the Gene-Z UEFI BIOS have the monitor tab broken down into four additional pages, Voltage, Temperature, Fan Speed Monitor and Fan Speed Control. Above you can see the Temperature page, always a good place to start to make sure nothing is ready to go up in smoke.
The Onboard Devices Configuration Page allows us to enable or disable the onboard device should you choose to run a dedicated piece of hardware instead, or simply have no plans to use the onboard versions.
Here we have the iROG Configuration page.
Above we have the ROG Connect page.
The LED Control page lets us disable the various LED’s on the ROG motherboards.
The ASUS Maximus IV Extreme-Z and the Gene-Z UEFI BIOS have the monitor tab broken down into four additional pages, Voltage, Temperature, Fan Speed Monitor and Fan Speed Control.
The Voltage Monitor page combines most of the system voltages into one place that’s easy to read.
Above you can see the Temperature page, always a good place to start to make sure nothing is ready to go up in smoke.
As you can see above the Fan Speed Monitor displays the fan speeds in the system.
Above we have the fan speed control page.
The boot page has all the features regarding boot orders, and options.
The Tools page of the UEFI BIOS has the EZ Flash 2 Utility, ASUS SPD Information, OC Profiles, Go Button File, and the BIOS Flashback utility.
The ASUS Speed Information page shows the latencies and timings of the Memory JDEC and XMP settings.
The ASUS UEFI BIOS gives us places to store eight different BIOS profiles.
The Go Button page allows you to input the settings that you want the Go Button to work from.
Above you can check out the BIOS Flashback page, here we can switch which BIOS chip we boot from.
Above we can load the optimized Defaults, Save Changes, Discard Changes, switch to the ASUS EZ Mode, or Launch EFI Shell from a file system device.
One little tidbit I noticed about the ROG BIOS (aside from the colors which match the ROG Red and Black) was that the system doesn’t default to the EZ Mode. Instead it heads directly into the Extreme Tweak and if you want the EZ Mode you have to switch to it.