The ASRock X299 Extreme 4 is an entry-level motherboard from ASRock designed to give users an inexpensive step into the premium land of the high-end desktop. At $200, it is the least expensive X299 motherboard we have tested, but still has a plethora of features including USB 3.1 ports, dual M.2 slots, premium audio, as well as SLI and Crossfire support. The mid-range feature set on an entry-level board makes for an intriguing selection. 

ASRock X299 Extreme4 Overview

ASRock has used the Extreme line in their motherboards almost as far as I can remember. The lineup usually starts with an Extreme3 and ends with Extreme9 (or Extreme11 for some special products). The Extreme3 and Extreme4 boards have always been reserved for the entry level, attempting to offer a feature set found on more expensive boards from the competition. Many users (and reviewers) have called the Extreme4 one of the better 'bang for your buck' motherboards available. 

The ASRock X299 Extreme4 is aiming high. It has large dual heatsinks to keep an 11-phase power delivery cool, dual M.2 slots both able to work at PCIe x4 speeds, SLI/Crossfire support, and USB 3.1 ports on the rear panel. While it may not have some of the added extras from the mid-range price segment (three M.2 slots, three-way GPU, front panel USB 3.1), it has enough of the major features to merit a good entry into the platform. 

Our performance results show the Extreme4 is a competitor in all the tests, landing in the middle in just about everything we normally throw at it. ASRock's Multi-Core Enhancement seems to match the majority of boards we have tested, and is the reason the results we have are all around the top of that bell curve. The X299 Extreme4 boosted all cores to 3.6 GHz in any multithreaded test, and 4 GHz in single threaded ones. Our gaming results were fine as well, with this Ex4 showing out in ROTR with the most FPS yet, while the AOTSe testing showed an average result in 1080p, but for some reason was the slowest at 4K UHD, but by a small margin. Our overclocking adventures when smooth overall, with the board being able to handle our CPU at 4.6 GHz without worry.

The ASRock X299 Extreme4 is currently priced at $200 from Newegg and at the time of this writing. In this price range, its direct competitors are the MSI X299 Raider at $210 and the Gigabyte X299 AORUS Gaming at $210, both also from Newegg. All boards have their pluses and minuses but one big difference is the AORUS Gaming only supports the quad-core Kaby Lake processors only while the others support the full range of both Skylake-X and Kaby Lake-X processors. Otherwise, the biggest differences between these boards come from RAM speeds/capacity, USB port type and number, as well as PCIe slot count among other minor differences. 

ASRock's X299 Strategy

Historically, ASRock doesn't push the super-high price ranges that the other three motherboard manufacturers do, preferring to sit lower in the market at both the low and high prices in its stack. For high-end desktop platforms, this usually means they are the cheapest, and we see the motherboards for X299 from ASRock range from $200 up to around $400, or $423 for the XE version of the Professional Gaming i9.

ASRock's X299 Motherboard Lineup
Amazon Newegg
X299 Extreme4     $200
X299 Killer SLI/ac   $240 $230
X299 Gaming K6   $278 $260
X299 Taichi Review 10/31 $295 $300
X299 Taichi XE     $323
X299 OC Formula     $400
X299 Professional Gaming i9 Review 9/26 $475^ $400
X299 Professional Gaming i9 XE     $423
X299E-ITX/ac Review 12/4 $510^ $400

^ = sold by 3rd party

Information on Intel's X299 and our other Reviews

With Intel's release of the Basin Falls platform, encompassing the new X299 chipset and LGA2066 socket, a new generation of CPUs called Skylake-X and Kaby Lake-X were also released. The Skylake-X CPUs range from the 7800X, a hex-core part, all the way up to an 18-core 7980XE multitasking behemoth. Between the bookend CPUs are five others increasing in core count, as in the table below. The latter HCC models are set to be launched over 2H of 2017.

Skylake-X Processors
  7800X 7820X 7900X   7920X 7940X 7960X 7980XE
Silicon LCC   HCC
Cores / Threads 6/12 8/16 10/20   12/24 14/28 16/32 18/36
Base Clock / GHz 3.5 3.6 3.3   2.9 3.1 2.8 2.6
Turbo Clock / GHz 4.0 4.3 4.3   4.3 4.3 4.3 4.2
Turbo Max Clock N/A 4.5 4.5   4.4 4.4 4.4 4.4
L3 1.375 MB/core   1.375 MB/core
PCIe Lanes 28 44   44
Memory Channels 4   4
Memory Freq DDR4 2400 2666   2666
TDP 140W   140W 165W
Price $389 $599 $999   $1199 $1399 $1699 $1999

Board partners have launched dozens of motherboards on this platform already, several of which we will have an opportunity to look over in the coming weeks and months. 

Other AnandTech Reviews for Intel’s Basin Falls CPUs and X299

To read specifically about the X299 chip/platform and the specifications therein, our deep dive into what it is can be found at this link.

X299 Motherboard Review Notice

If you’ve been following the minutiae of the saga of X299 motherboards, you might have heard some issues regarding power delivery, overclocking, and the ability to cool these processors down given the power consumption. In a nutshell, it comes down to this:

  • Skylake-X consumes a lot of power at peak (150W+),
  • The thermal interface inside the CPU doesn’t do much requiring a powerful CPU cooler,
  • Some motherboard vendors apply Multi-Core Turbo which raises the power consumption and voltage, exacerbating the issue
  • The VRMs have to deal with more power, and due to losses, raise in temperature
  • Some motherboards do not have sufficient VRM cooling without an active cooler
  • This causes the CPU to declock or hit thermal power states as to not degrade components
  • This causes a performance drop, and overclocked systems are affected even more than usual

There has been some excellent work done by Igor Wallossek over at Tom’s Hardware, with thermal probes, thermal cameras, and performance analysis. The bottom line is that motherboard vendors need to be careful when it comes to default settings (if MCT is enabled by default) and provide sufficient VRM cooling in all scenarios – either larger and heavier heatsinks or moving back to active cooling. 

Visual Inspection
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  • 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.
  • 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!!!
  • milkod2001 - Friday, April 27, 2018 - link

    Yeah, i guess playing with your funny in front on web camera does pay something. Good for you.
  • 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...! :)
  • 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?)
  • 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.
  • 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.

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