When it comes to small form factor systems, options are few and far between. For AMD's X570, out of the 35+ motherboards currently available, just four of them are smaller than mATX. This doesn't give users much to choose from. In this case, mini-ITX implementations have to get it right, and over the last few years ASRock has been at the forefront of the enthusiast small form factor market with an array of models. Today we are reviewing its latest mini-ITX motherboard, the ASRock X570 Phantom Gaming-ITX/TB3. This unique product incorporates Thunderbolt 3 into the frame, pairing it with 802.11ax Wi-Fi 6 as well. Read on for our review.

All the Small Things

Having a range of products to choose from can be a little daunting and when it comes to building a PC. Users have to strike a balance between features, quality, and budget, and all somewhat tedious to achieve in unity. High-end features can now be found on mid-range hardware, but some of them lack that special finesse. One particular section of products where things must be done correctly is in the small form factor, as being small shouldn't necessarily hinder performance from a high-performing desktop processor. There are obvious limitations on a small form factor platform such as mini-ITX, and the main one considered to be the biggest hindrance is the size.

The ASRock X570 Phantom Gaming-ITX/TB3 looks to dominate the AMD AM4 mini-ITX market with the implementation of some highly premium features including Thunderbolt 3, a DisplayPort 1.4 input to allow users to run multiple 4K screens from a discrete graphics card, and an Intel AX200 Wi-Fi 6 802.11ax wireless interface. The balance made to accommodate all of this is the presence of only a single PCIe 4.0 x4 M.2 slot, which is located on the rear of the board. However, there are four SATA ports with support for RAID 0, 1, and 10 arrays. Along the bottom of the board is a single full-length PCIe 4.0 x16 slot, with a range of front panel headers and connectors closely located around it. 

If that wasn't enough, this motherboard also has Intel LGA115x cooling mounts, and not the regular AMD AM4 cooling mounts. We'll go into the reasons why and how later in the review.

Memory support on the ASRock X570 Phantom Gaming-ITX/TB3 is also impressive, with support for up to DDR4-4533 and up to 64 GB across its two available slots. As it stands, this model has the highest-rated mini-ITX support out of the box in terms of memory speed, but to utilize it to best effect, users will need to tweak the Infinity Fabric clocks within the firmware

Enthusiasts looking to utilize the overclocking capabilities of Ryzen 3000 and X570 will find a 10-phase power delivery which on paper, certainly looks capable for a board of this size. It's spearheaded by a Renesas ISL69147 PWM controller which is operating in a 4+2 configuration. The CPU section has eight ISL99227 60 A power stages which are doubled up with four ISL6617A doublers which are commonly used by vendors these days. The biggest aspect to consider aside from the quality of the power delivery is the heatsink cooling it and ASRock's implementation is very hearty in the weight and mass department. It has two heatsinks which are connected via a heat pipe which connects the power delivery section to the chipset heatsink, which also includes a small cooling fan within the main section. The SoC section of the power delivery has its own heatsink with all of the board's heatsinks affixed securely to the board with screws.

ASRock X570 Phantom Gaming-ITX/TB3 Block Diagram

Another notable aspect to consider on the ASRock X570 Phantom Gaming-ITX/TB3 is it comes supplied with Intel LGA115x cooling mounts. While the majority of users are questioning what the logic is behind this, this model is mini-ITX and as such, there aren't as many low profile coolers available on the market for AM4 as there are for LGA115x. Including an Intel mount on this smaller form factor AMD board actually improves cooler compatibility with some coolers, but the implementation of the heatsinks does cause concern that some coolers just will not fit. ASRock has a cooler compatibility list which is made up of supported Corsair, Silverstone, and Noctua coolers, but in retrospective, it's a little thin and something users should consider if looking to purchase this model.

The TL;DR on Performance

Judging the ASRock X570 Phantom Gaming-ITX/TB3 on performance, in our system tests we found it to perform very well with our system tests with low power consumption, quick booting times in our POST test, and good out of the box DPC latency performance. In our computational testing, we found the results to be competitive with scores at the top of the charts in our 3DPM point calculation test, but lower than expected performance in tests such as our Blender rendering test. It paints an average and overall picture in the grand scheme of things, but performance differences between most models previously tested are marginal, and as stated, its performance is competitive.

Our experience of overclocking our Ryzen 7 3700X processor on the ASRock X570 Phantom Gaming-ITX/TB3 was heavily focused around the VDroop when leaving the LLC profiles up to the firmware. When running our manual overclocks, we found that we experienced quite a bit of VDroop at all frequencies testing. At 3.6 to 4.2 GHz with 1.25 V set for the CPU VCore in the BIOS, we experienced around 0.019 V of VDroop. This isn't necessarily bad and we experienced no instability in our testing within our parameters. A noticeable benefit of the VDroop effect came in our power consumption with figures below what we have experienced on other boards at the same or with similar settings. Performance in our POV-Ray benchmark was good and consistent as we went up 100 MHz. Another point to note is those CPU temperatures were a little warmer than expected, but that can be attributed to the form factor and the density of components around a tightly packed AM4 CPU socket. This still doesn't explain the warmer than normal CPU temperatures at default settings and we noticed higher than usual CPU VCore voltage at load than the previous X570 models we've seen; applying PBO even though on the latest ABBA AGESA from AMD saw no improvement over stock either.

The Competition

Users have little to choose from in the SFF space, and the ASRock X570 Phantom Gaming-ITX/TB3 positions itself in the market well with a relatively low price of $240. Compared with what's currently on the market, the GIGABYTE X570 I Aorus Pro WIFI ($220), the ASRock X570 Phantom Gaming-ITX/TB3 looks to be the better of the two on specifications (we have a test of the GBT coming soon). The ASUS ROG Strix X570-I Gaming ($299) and the slightly bigger mini-DTX ROG Crosshair VIII Impact (£384) and both ASUS models are also competitive in the small form factor X570 space. The ASRock X570 Phantom Gaming-ITX/TB3 in a very good position for users looking to drive multiple displays from Thunderbolt 3 and build a high-performance small form factor gaming system. There are caveats such as a single PCIe 4.0 x4 M.2 slot and alas, no motherboard is perfect, but ASRock has a fine run of solid mini-ITX models across multiple chipsets and with Thunderbolt 3 and Wi-Fi 6 802.11ax wireless connectivity driving the feature set, small isn't always less.

Read on for our extended analysis.

Visual Inspection
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  • drexnx - Wednesday, October 9, 2019 - link

    even before I knew it was a blink 182 reference, I still read it as "all the...small things"
  • Tuxie - Wednesday, October 9, 2019 - link

    I'm still waiting for a Mini-ITX board with AM4, 2x M.2 and 10GbE. No need for WiFi, SATA, TB or onboard DP/HDMI.
  • jeremyshaw - Wednesday, October 9, 2019 - link

    The last part is what kills this board for me. It wastes space on DP and HDMI (technically, just HDMI, since the DP is an input for the TB3), when it already has a TB3/USB-C connection to handle video output. If someone insists on using a $220 board for a 3400G (and I am being extremely generous here), let them fall on their own sword. Let them spend the extra $20-30 on a DP-->HDMI adapter. Don't waste precious space on this board with a HDMI connector.

    Even worse, the Intel version of this board has all of the same outputs, PLUS two more USB ports and another M.2 slot. So no matter how I slice it, this board is down on features vs existing ASRock boards. From what I understand, ASRock didn't link the M.2 slot to the extra 4 PCIe lanes from the CPU, either, so it's sharing bandwidth from the chipset (with LAN & TB3), just like the Intel board. What a waste.
  • umano - Friday, October 11, 2019 - link

    I totally agree, let's hope in the future
  • FiveOhFour - Saturday, January 11, 2020 - link

    i agree but the hdmi part isn't fair it makes sense given how common this form factor is for use as a home theatre pc
  • FiveOhFour - Saturday, January 11, 2020 - link

    thats a major dissapointment though for sure, so whats the best option for x570 boards with thunderbolt, aside from the $1,000 white one. I don't need a certain form factor, though it would've been nice, just the best/most features and quality and price
  • Valantar - Wednesday, October 9, 2019 - link

    They're not going to make a premium ITX board without WiFi - too risky in terms of lost sales. A lot of SFF PC users move their PCs around, and not all places have Ethernet available. Also, ditching SATA seems early - people have legacy devices still (though cutting it down to 2 SATA probably wouldn't be a deal breaker for many). Likely all of this could be fit on board if they went with some sort of stacked m.2 layout like the Gigabyte or the Strix.

    Beyond that, I agree on faster networking though. Even one of those Realtek 2.5GB controllers would be a huge (well, 2.5x) improvement. Fitting a 10GbE controller might be too tight of a fit, sadly. But maybe on a daughterboard/some sort of vertical m.2 board like WiFi controllers?
  • DanNeely - Wednesday, October 9, 2019 - link

    I doubt we'll see many 2 sata boards anytime soon; but the total is dropping and starting to shift downward. Looking at newegg listings, and limiting AMD to x70 boards since the remainder of the 5xx series isn't out yet:

    x370 3x 4 ports, 29x 6 ports, 76x 8 ports, 2x 10 ports.
    x470 21x 4 ports, 147x 6 ports, 19x 8 ports
    x570 36x 4 ports, 181x 6 ports, 83x 8 ports.

    10 ports has disappeared as an option. 4 ports has grown from 3 to 11% of the total, and despite bouncing back a bit this year 8 port models are a minority of designs now vs the default in x370 boards.

    On the intel side, and sticking to Z series boards to stay with the same general market segment as AMD:

    Z170: 3x 2 port boards, 20x 4 port, 68x 6 ports, 8x 8 ports.
    Z270: 9x 4 port, 74x 6 port, 19x 8 ports.
    Z370: 43x 4 port, 129x 6 port, 1x 8 port
    Z390: 66x 4 port, 476x 6 port, 18x 8 port.

    Similar trends overall; 8 port is much less common on Intel boards because their consumer chipsets only have 6 sata ports available; 8+ requires a 3rd party controller and has been much less common for years as a result.

    With both brands I suspect the transition will be slow because consumer boards suffer from feature checkboxitis and the connectors are cheap. Reducing support on the chipset would push things faster but sata controllers are relatively small/cheap compared to top of the line USB/PCIe ones and both companies are doing variations of the flexible IO port thing so it doesn't cost them much either. It'll happen eventually, but I don't expect to see much movement until the price/GB gap narrows at lot between SSD and HDDs because of people wanting to make DIY NAS/Storage servers.
  • Heavenly71 - Wednesday, October 9, 2019 - link

    Sadly this board severly lacks USB ports. And it also doesn't have an internal header for front panel USB-C.
  • imaheadcase - Wednesday, October 9, 2019 - link

    That isn't really a issue considering all the options you can add usb to a system now-a-days.

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