The ASUS ROG Strix Z370-I Gaming is one of the major Mini-ITX options for Intel's latest Coffee Lake processors. ASUS has a good history of building substantial Mini-ITX offerings, particularly with the ROG Impact line, however it is the Z-series mainstream Mini-ITX models that are the more cost effective option. For this generation, ASUS is combining dual M.2 slots, USB 3.1, EMI shielded audio and Wi-Fi on this small square platform. In this review we put it through its paces.

AnandTech Intel Z370 Motherboard and CPU Coverage

ASUS ROG Strix Z370-I Gaming Overview

The Mini-ITX space of the Z370 platform will typically attract users who want a powerful PC in a small package - a build will use a Z-chipset who also want to take advantage of some of the Z-exclusive features, otherwise the H-series is usually more cost effective. These builds are high-performance: almost going up to X299, but with fewer cores and higher frequency, or exchanging this for a quieter system.

Board partners take notice of the markets, and each of the four major brands have at least one Mini-ITX offering. Potential buyers are looking for a combination of feature set, appearance, and performance, in order to choose the right board for their needs. The ASUS ROG Strix Z370-I Gaming it built to support the flagship i7-8700K processor (including overclocking), has multiple M.2 slots, Wi-Fi, RGB LEDs, and delivers it in a 17cm square package. 

The Strix Z370-I Gaming performed admirably in all our tests scoring as good as any other motherboard in the CPU/GPU performance tests. As tested, the BIOS on this board comes with multi-core enhancement enabled out of the box, in a similar fashion to the others we have tested so far. As a result the system ends up running all cores at 4.3 GHz. For our system tests, the biggest win was in the boot time - as seen in older platforms, ASUS has the fastest booting board we have tested so far. The small board can do more than just boot quickly, however. In overclocking, we saw some impressive numbers.

In our overclocking testing, as shown in the table above, the ASUS Z370-I Gaming is a capable overclocker, taking our i7-8700K to 5.1 GHz stable. The limiting factor here was our CPU temperatures, as the voltage was only slowly increasing still at 5.1 GHz. For automatic overclocking, the 5-Way Optimization process raised the all core boost to 4.7 GHz but added a -3 AVX offset (100 MHz over stock). Up to four cores were set for 5 GHz, which was a 300MHz improvement over its single-core boost of 4.7 GHz. The power delivery heatsinks, though not large, managed the heat loads without issue. While overclocking may not be a primary focus of a Mini-ITX sized motherboard, the Z370-I Gaming handled it with grace. 

For onboard features, the board manages to squeeze two M.2 slots in its small amount of real estate. The primary slot is located on the front of the board and shares a heatsink with the chipset. The other M.2 is on the rear, rather than a vertical M.2 slot which ASUS does on its larger motherboards. In addition for storage, the board has four SATA ports vertically oriented around the DRAM slots. For networking, ASUS chose an all Intel setup in the I219-V GbE and 802.11ac AC-8265 for Wi-Fi. 

The back panel IO gives users several USB ports - four USB 2.0, and four USB 3.0 - it is worth nothing that the Type-C connector isn't USB 3.1 (10 Gbps), but the board does have an onboard header for USB 3.1 though. Also on the back panel are Displayport and HDMI video outputs for using the integrated GPU. The audio stack uses an upgraded Realtek ALC1220A solution, has five output jacks, and a SPDIF out as well. 

Pricing on the Strix Z370-I Gaming comes in at $179 at Newegg. This price point puts it in the same price bracket as the MSI Z370-I Gaming Pro Carbon AC ($174),  ASRock Fatal1ty Z370 Gaming-ITX/ac ($180), SuperO C7Z370-CG-IW ($187), with GIGABYTE's Z370N WiFi ($152) costing almost $30 less. 

ASUS Z370 Strategy

ASUS brings a number of Z370 motherboards to the table ranging from the Mini-ITX Z370-I Gaming to the flagship Maximus X Formula. The Republic of Gamers boards consisting of the Maximus and Strix series are most of the lineup, with the TUF and Prime lineups each having two boards. Prices range from $130 (Newegg) TUF-Plus for entry-level up to the flagship ROG Maximus X Formula at $441 (Amazon). It's a pretty wide price range with boards of all shapes, sizes, sizes and included features.

ASUS' Z370 Motherboard Lineup
Amazon Newegg
ROG Maximus X Formula   $350 $350
ROG Maximus X Apex LINK $318 $318
ROG Maximus X Code   $279 $280
ROG Maximus X Hero Wi-Fi AC   $260 $260
ROG Maximus X Hero   - $241
ROG Strix Z370-F Gaming   $202^ $180
ROG Strix Z370-E Gaming   $187 $200
ROG Strix Z370-G Gaming   $196 $208
ROG Strix Z370-H Gaming   $156 $156
ROG Strix Z370-I Gaming [this review...] $201 $254
TUF Z370-Pro Gaming   $152 $151
TUF Z370-Plus Gaming   $156 $125
Prime Z370-A   $160 $164
Prime Z370-P   $130 $130

^ - 3rd party seller

Pages in This Review

  1. Overview
  2. Visual Inspection
  3. BIOS and Software
  4. Board Features
  5. Benchmark Overview
  6. System Performance
  7. CPU Performance
  8. Gaming Performance
  9. Overclocking with the i7-8700K
  10. Conclusions
Visual Inspection
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  • Ian Cutress - Monday, May 21, 2018 - link

    Correct; updated.
  • hansmuff - Monday, May 21, 2018 - link

    A DisplayPort connector! Yay! Too many Mini-ITX have been skipping those, including some ASUS boards.
  • ಬುಲ್ವಿಂಕಲ್ ಜೆ ಮೂಸ್ - Monday, May 21, 2018 - link

    "it is worth nothing that the Type-C connector isn't USB 3.1 (10 Gbps)"
    It must be worth something or why even have it?
  • Mr Perfect - Monday, May 21, 2018 - link

    What are the BIOS defaults like?

    We've got a couple older Z170 Asus Maximus VIII Impact machines around, and for some reason the BIOS defaults to all non-standard values. If you want to run things at stock/standard you have to specifically change them to be that. It's especially annoying because BIOS updates reset all of your settings to Asus' defaults.

    Asus has some nice hardware, but I really don't feel like fighting them on BIOS defaults.
  • nimi - Tuesday, May 22, 2018 - link

    What do you mean by non-standard values? Did you accidentally load a overclocking profile or something?
  • 12345 - Tuesday, May 29, 2018 - link

    It's very common for intel motherboards to set very high voltages for stuff like system agent. This very board will auto set vccio and vccsa to like 1.2-1.3v when the bios itself describes default as like .96v
  • nimi - Tuesday, May 22, 2018 - link

    You forgot to edit the copy/pasted lineup table on the first page, it claims this review is for the Maximus X Apex with the Z370-I Gaming "in testing".
  • AnnoyedGrunt - Tuesday, May 22, 2018 - link

    I've been very intrigued by the mini-ITX format for a new build. I'd be doing an AMD version, but from what I can see, if you aren't going to do SLI, the mini-ITX boards offer a great value. You get intel networking, intel wi-fi, Realtek 1220 sound, NVME storage slots, all in a small package with a reasonable cost.

    ATX boards with those features tend to be quite a bit more expensive, especially on the AMD side (or you sacrifice some of the features).

    Of course, once you load up a build with an ATX PSU, large cooler, GPU, ODD (I still buy CD's and need a way to rip them) the size starts to be similar to a regular ATX build. Still, I like the minimalist approach to the motherboard.

  • imaheadcase - Tuesday, May 22, 2018 - link

    You pointed out exact reason why not to get this, so this board should be used in most builds no problem. Its really nice simply to have a small case as well.
  • creed3020 - Tuesday, May 22, 2018 - link

    Error in the table at the bottom of page 1. The note [this review] is in the wrong row. Looks like a C&P error from the previous review of the ROG mITX board.

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