ASRock Z370M-ITX/ac and Z370 Gaming-ITX/ac

The last two ASRock boards left in their current Z370 lineup are the Z370M-ITX/ac and the Z370 Gaming-ITX/ac. While their pedigree is a bit different, with the latter coming from the Gaming line, they are both mini-ITX sized boards intended to fit in small form factor cases. Due to the size, neither SLI nor Crossfire support is possible due to only one PCIe slot in place, but the idea for this size is to have a small powerhouse. The Gaming-ITX/ac will have more or higher-end features and will come in at a higher price point out of the two, because it also has an onboard Thunderbolt 3 chip.

The Gaming-ITX board, as all mITX sized boards seem to, look pretty cramped as there is very little free space on the board. This board uses a heatpipe to connect the power delivery heatsink to the chipset heatsink, with the Thunderbolt controller also taking advantage. Only the Gaming-ITX has a reinforced PCIe slot at the bottom of the board, which is rated to PCIe 3.0 x16 from the processor. As far as overall looks, there isn’t really a theme so much as it is a black PCB with a lot going on in a small space. The board does have red LEDs on the bottom by the PCIe slot and does and an RGB header for adding additional flare.

The Z370M-ITX also doesn’t have much in the way of beautification going either. On this board all six of its power delivery phases have a heatsink, but it is noticeably smaller than the one in the Gaming-ITX and is not connected via a heatpipe to the chipset heatsink (which is also slimmed down). Due to the smaller chipset heatsink, the M.2 slot on the Z370M-ITX is located on the front of the board, just above the non-reinforced PCIe slot, rather on the rear. 

Memory capacity is limited to one module per channel, due to having two slots instead of four because of the size. Similar to the other ASRock boards, the quoted speeds for these two boards are higher than the other vendors, with the Gaming version supporting DDR4-4333 and the standard Z370M-ITX going for DDR4-4000. Interestingly for the PCIe slot, the Gaming-ITX/ac specifications does mention support for PCIe riser cards to extend one x16 slot to two x8 slots, should users have access to an appropriate riser card. That being said, the system does not ship with SLI certification, and thus support may be limited to Crossfire in this scenario.

Both boards have a single PCIe 3.0 x4 based M.2 slot, with the Z370M-ITX having it on the front and the Z370 Gaming-ITX on the rear. Despite some of the larger boards from other vendors having only four SATA ports, ASRock goes for all six on both of the mini-ITX boards, and placed such that interlocking cables should not interfere with each other if drives need to be removed.

For fan headers, they each have three, with ASRock's 'CPU Optional/Water Pump' fan header able to output 1.5A/18W. Both of them also have Wi-Fi modules, although the one in the Gaming uses the Intel AC8265 while the Z370M-ITX uses the AC3165. The boards differ in audio, with Gaming-ITX/ac using the Realtek ALC1220 and adding all the bells and whistles from the Gaming line (Nichicon Gold Series audio caps, T.I NE5532 headset amplifier), compared to the Z370M-ITX which uses a Realtek ALC892. The boards also differ on networking in favor of the Z370M-ITX which has dual Intel (I219-V, I211-AT) whereas the Gaming-ITX only has one (I219-V).


The key difference in the support between the two boards is going to be the Thunderbolt 3 port on the Gaming-ITX. This port supports video outputs and USB 3.1. Other USB support on the back panel of the Gaming-ITX/ac is provided by the six USB 3.1 (5 Gbps) ports. Elsewhere on the panel is a combination PS/2 port, a clear CMOS button, the antenna connectors, HDMI video output, DisplayPort video output, the ethernet connection, the audio jacks, and SPDIF.

For the Z370M-ITX/ac, there is no Thunderbolt port, but in its place are two HDMI ports. This comes with the DisplayPort to round out the video outputs. USB connectivity comes from two USB 2.0 ports and six USB 3.1 (5 Gbps) ports. The two network ports look fairly ominous, but are paired with the Wi-Fi module just next door. The audio supplies three jacks, with no SPDIF here.

ASRock Z370 Gaming-ITX/ac and Z370M-ITX/ac
  Z370 Gaming ITX/ac Z370M-ITX/ac
Warranty Period 3 Years
Product Page Link Link
Price Amazon US Amazon US
Size ATX
CPU Interface LGA1151
Chipset Intel Z370 Express
Memory Slots (DDR4) Two DDR4
Supporting 32GB
Dual Channel
Support DDR4-4333 Support DDR4-4000
Network Connectivity 1 x Intel I219-V
Intel AC8265 Wi-Fi
1 x Intel I219-V
1 x Intel I211-AT
Intel AC3165 Wi-Fi
Onboard Audio Realtek ALC1220 Realtek ALC892
PCIe from CPU 1 x PCIe 3.0 x16 slot
PCIe from Chipset None
Onboard SATA 6 x Supporting RAID 0/1/5/10
Onboard SATA Express None
Onboard M.2 1 x PCIe 3.0 x4 1 x PCIe 3.0 x4
Onboard U.2 None
USB 3.1 (10 Gbps) 1 x Type-C (via Thunderbolt) None
USB 3.1 (5 Gbps) 6 x Back Panel
1 x Header
USB 2.0 1 x Header
Power Connectors 1 x 24-pin EATX
1 x 8-pin ATX 12V
Fan Headers 1 x 4-pin CPU (1A/12W)
1 x 4-pin CPU Opt (1.5A/18W)
1 x 4-pin Chassis Fan
IO Panel 2 x Antenna ports
1 x Combo PS/2 
1 x HDMI port
1 x DisplayPort 1.2
1 x Intel TB3 (Type-C)
1 x Optical SPDIF out
6 x USB 3.1 (5 Gbps) 
1 x RJ-45 LAN port
1 x Clear CMOS button
6 x Audio Jacks
2 x Antenna ports
1 x Combo PS/2
2 x HDMI ports
1 x DisplayPort 1.2
2 x USB 2.0 ports
6 x USB 3.1 (5 Gbps) ports
2 x RJ-45 LAN ports
3 x Audio Jacks
ASRock Z370M Pro4 EVGA Z370 Classified K and Z370 FTW


View All Comments

  • EricZBA - Friday, October 20, 2017 - link

    The Asus Strix Z370-G mATX may be up on Amazon's website, but it has been Out of Stock ever since the page went up with no shipping date in sight. NewEgg Canada has it out of stock and NewEgg's US website doesn't even have a page for it. To call it available is inaccurate. Reply
  • Rubinhood - Friday, October 20, 2017 - link

    Coffee Lake & related hardware is the new Duke Nukem Forever :) Reply
  • xchaotic - Monday, October 23, 2017 - link

    Well, I am typing this on Asus Strix Z370 I + i5 8400 PC so not entirely vaporware. People may be whining but it seems that Intel can't keep up with the demand... Reply
  • piiman - Thursday, October 26, 2017 - link

    got an 8600k today at Newegg. They still have stock after 4 hours so it looks like they may be starting to get large shipments. I7 is still out of stock though Reply
  • imaheadcase - Saturday, October 21, 2017 - link

    Amazon is different than newegg, if it says Out of Stock, if you order it it will ship when it comes in stock. Sometimes it will be same day even or next day. Amazon will only show "This item is not available" if completely out of stock for foreseeable future. They do this because it stops items from completely selling out right away so supply can be steady. Reply
  • Morawka - Saturday, October 21, 2017 - link

    I have found that Asus treats USA customers like a red headed step child. They will send units to the UK, australia, and all of Europe before they will send 1 single board to the USA.

    Some advice: Start looking at Overclockers.UK and have it imported to the USA.. The $30 DHL International shipping is faster than USPS Priority Mail or UPS International Express Saver. No VAT tax either.

    This is what i had to do to get a Rampage VI Extreme. Newegg hasn't gotten a R6E in stock for 2 months after the initial release batch.
  • SpartanJet - Sunday, October 22, 2017 - link

    Does Asus USA cover warranty issues then since you bought it from UK? Reply
  • Xeres14 - Monday, October 23, 2017 - link

    Yeah I've been waiting on the Asus z370-g. I can't find an i7-8700k right now either so it's all right. Hopefully I'll be able to get both before Christmas (along with the rest of the upgrade). Reply
  • stuffwhy - Friday, October 20, 2017 - link

    This is so great. I find it increasingly difficult to find the right mainboard and this type of posting consolidates a lot of research time. Reply
  • SanX - Sunday, October 22, 2017 - link

    There are no "right" mobo here. Right future proof and super fast mobo has to be a dual-processor at least. Dual-SLI for example offers benefits for speed but in many cases the dual-chip is doing the same in simulations. Reply

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