On the Extreme4, the board was shipped with BIOS 1.12 - there has since been an update to BIOS 1.30 which has the Meltdown/Spectre updates in them. When we first boot up, the Extreme4 presents us with the "Main" screen in the advanced version of the BIOS first. The Main screen is informational only showing the UEFI version, processor type, speed, and cache amount, total memory, and more.

The Ex4 does have an easy mode, which I am surprised that this board doesn't boot into by default. The EZ Mode is also more of an informational screen but does have a few editable options. Like the Main screen, we can see the UEFI version, processor type and speed, DRAM and storage information, fan speed, temperatures, and boot priority. Users are able to enable XMP profiles, RAID modes, adjust boot priority and fan speed control as well. The CPU EZ OC button is for simple, one-touch overclock and enables the first level of Optimized CPU OC settings from the advanced BIOS of 4.2 GHz. 

The OC Tweaker section below is where overclockers will spend most of their time. This section holds all the options needed to overclock the CPU and memory. ASRock divides this up into four sections: CPU / DRAM / Voltage / FIVR Configuration. The CPU Configuration section is where the CPU ratio and mesh can be adjusted as well as power saving features like Speedstep. This is also where users can apply AVX offsets. The DRAM configuration section is where users will find the memory options. XMP profiles can be enabled here as well DRAM frequency changes and memory timings changes are all found here. The voltage configuration portion is where users can change options from the Input voltage, Load-Line Calibration, VCCIO and VCCSA, to the DRAM channel voltage. Last, the FIVR configuration is where we are able to control and of the voltage domains such as Vcore, CPU Mesh, System Agent voltage. There are plenty of options available here for overclocking.



The Advanced section of the BIOS lists several options from CPU configuration (enabling/disabling HT, number of active cores, etc), Chipset configuration (PCIe link speeds, LAN and Audio), Storage Configuration (SATA and M.2), as well as USB configurations. This section is also where users are able to choose their landing page in the BIOS. If a user wants the system to enter EZ Mode first when entering the BIOS, then the OC Tweaker screen, simply adjust the settings. 

The Tools section groups a few handy items together with their own utilities to control board functionality. RGB LED control, Easy RAID Installer, UEFI update options (Instant Flash and Internet Flash) as well as network configurations. 

The H/W Monitor section gives users an idea of CPU and motherboard temperatures as well as fan speeds and voltages from the major domains as well as from the power supply. Towards the bottom of this section is where users are able to use ASRock's Fan-Tastic Tuning to adjust fan speeds and use profiles. 

The Boot header contains options to change the boot order as well as change boot options such as HDD priorities for multiple drive boots, fast boot, and other boot-time options. 


As far as included software goes, the included installation CD gives users what they need to get started for drivers. It includes the INF and ME drivers, Audio, LAN, and the ASRock APP Shop. It also includes utilities such as Restart to UEFI, and ASRock RGB LED to control the integrated and attached LEDs. 

ASRock's Live Update and App Shop application keep tabs on the basic drivers and BIOS versions and notifies users if there is an update to any. This can be a useful application to keep up to date.

ASRock also has the A-Tuning application which monitors the system and allows for changes to fan speed as well as overclocking. There are not as many options as we find in some other similar applications from their competitors, however, it has what most will need if they wanted to overclock from within Windows. The basics are all there. 


ASRock RGB LED is the application used to adjust any of the system lighting be it the integrated RGB LEDs under the chipset heatsink or any the user may attach to the board via its two headers. It has several styles to choose from as well as being able to make any RGB color. 

For audio is the Realtek HD Audio Manager. This is a standard interface supplied with many systems, with presets and EQ settings available.

Visual Inspection Board Features


View All Comments

  • eas1974 - Thursday, April 26, 2018 - link

    My current rig is sporting the X99 extreme 4 from Asrock. It's been a overall awesome board. The only problem was i broke off one of the usb 3 headers on the board but it was my fault. Overclocked my 5820k to 4.2G. Dual GTX970's. It still chews up anything I through at it. I would defninlty buy another Asrock board. Reply
  • LaraDuncan - Thursday, April 26, 2018 - link

    I resigned my office-job and now I am getting paid 85 D0llar hourly. How? I work over internet! My old work was making me miserable, so I was forced to try something different, two years after...I can say my life is changed-completely for the better!

    Check it out what i do....
  • Total Meltdowner - Thursday, April 26, 2018 - link

    Whoa 85?! Show me how!!! Reply
  • milkod2001 - Friday, April 27, 2018 - link

    Yeah, i guess playing with your funny in front on web camera does pay something. Good for you. Reply
  • MDD1963 - Friday, April 27, 2018 - link

    Instead, I too became a piece of shit scamming adds about 'Earn $85/hr from home' on tech forums...! :) Reply
  • allenb - Friday, April 27, 2018 - link

    I've got the 5820K in an X99 Extreme 4 as well. It's never been anything less than perfect. If they've kept it up for this version, it'll be a fine product and not just for "cheap" (is a $200 motherboard ever cheap?) Reply
  • duploxxx - Thursday, April 26, 2018 - link

    15 motherboards reviewed of the same chipset, must be an INTEL part.....
    lots of **** that will buy this broken platform.
    Looking at how ryzen2 performs this x299 platform and its cpu selection will even be a bigger joke.
  • Ket_MANIAC - Thursday, April 26, 2018 - link

    Just compare those numbers to the no of Ryzen motherboard reviews they have done over the year, and you will be surprised. It seems people are more interested in buying 200 dollars and above motherboards for a stupid product line up than 100 for a fantastic price to performance king lineup. People expect good motherboard reviews and few websites out there are qualified to do so. Considering how much AnandTech's motherboard review numbers are highly regarded in the industry, I am sure hundreds of thousands of people were disappointed when they found out that there are no X370 or B350 reviews from Anand. I was. Reply
  • Galcobar - Monday, April 30, 2018 - link

    There have been four X370 boards reviewed, and two B350. Borrowed this list from the ASROCK ITX X370 review on the front page.

    $255 - MSI X370 XPower Gaming Titanium [review]
    $175 - GIGABYTE AX370-Gaming 5 [review]
    $160 - ASRock X370 Gaming-ITX/ac [this review]
    $110 - Biostar X370GTN [review]
    $98 - MSI B350 Tomahawk [review]
    $90 - ASRock B350 Gaming K4 [review]
  • Ket_MANIAC - Tuesday, May 1, 2018 - link

    Really makes us feel proud, eh? 6 reviews of a platform which everyone is buying while 15 of a platform the whole industry chastised and only testosterone fueled enthusiasts are buying to satisfy their ego. Really makes me proud of AnandTech. No review of the flagship Crosshair Hero, no review of the phenomenally successful Taichi, not a mention of the extremely popular Prime X370 and Asrock B350 Gaming Pro. Really, this website is outdoing itself. Nevermind, 2nd gen is here and I hope things improve. Reply

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