Intel Z390 Motherboard Overview: 50+ Motherboards Analyzed
by Ian Cutress & Gavin Bonshor on October 8, 2018 10:53 AM EST- Posted in
- Motherboards
- Intel
- MSI
- Gigabyte
- ASRock
- EVGA
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- Z390
ASUS ROG Strix Z390-I Gaming
It seems that ASUS has retired or laid the Maximus Impact branded mini-ITX boards to stud as we haven't seen one in the wild since the Z170 chipset; the ASUS Z170 Maximus VIII Impact. While the ever-popular Impact doesn't look to feature in current or future plans for that matter, users looking for a mini-ITX option from ASUS will need to look towards the ROG Strix Z390-Gaming, which in reality doesn't seem all too dissimilar aside from the regular implemented power delivery; not the vertically mounted one feature on the Impact series.
Visual aspects to note include solid grey colored heatsinks with Edge holographic branding towards the bottom of the rear panel cover and RGB lovers will be glad to know there's a customizable LED strip located on the right-hand side; underneath the 24-pin ATX motherboard power input. As expected on a mini-ITX motherboard, there's a single full-length PCIe 3.0 x16 slot and the PCB space has been utilized well with a single M.2 slot with inclusive and combined chipset heatsink, as well as an additional M.2 slot on the rear. The Strix Z390-I Gaming also contains four SATA ports which feature straight angled connectors; arranged into two pairs on either side of the RAM slots.
Speaking of RAM, this board supports up to DDR4-4600 which is the fastest of any Z390 board which is one of the reasons extreme overclockers select two-slot ASUS boards as one of their main options in competitive benchmarking. Another highly notable difference in the memory compatibility is that the two RAM slots support up to 64 GB in capacity. This is in line with our expose from Zadak which is manufacturing a double height and double capacity DDR4 32 GB RAM modules with the specifications of the ROG Strix Z390-I Gaming stating that this new type of memory module is officially supported.
The mini-ITX sized ROG Strix Z390-I Gaming is one of only a small handful of Z390 motherboards to have an HDMI 2.0 video output and in addition to this, is a single DisplayPort. An Intel I219V Gigabit LAN port is present with antenna connectors for the included 2T2R Wave 2 802.11ac Intel 9560 Wi-Fi adapter. The USB looks a little lacklustre compared to the ASRock Z390 Phantom Gaming-ITX/ac with two USB 3.1 Gen2 Type-A, two USB 3.0 Type-A, two USB 2.0 and a single USB 3.0 Type-C port; no USB 3.1 Gen2 Type-C capabilities at all. The finishing touches to the Strix Z390-I Gaming is a Realtek based SupremeFX S1220A HD audio codec which powers the five 3.5 mm audio jacks and S/PDIF optical output.
The ASUS ROG Strix Z390-I Gaming pricing is yet to be announced but it won't be on the cheap side, while this model looks to keep most of the high spec features from the ATX sized ROG Strix Z390-E Gaming board, but with a much smaller overall footprint. The inclusion of dual M.2 is nice, but it isn't a unique feature with other mini-ITX Z390 offerings including this.
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Valantar - Wednesday, October 10, 2018 - link
That would be pretty shocking, yeah, but the sheer size of that lump of metal still has me a bit worried. Guess that's what you get when you try to squeeze power delivery for a CPU that (likely) pulls >300W when overclocked into an ITX board (and refuse to use riser boards like before, for some reason).FXi - Monday, October 8, 2018 - link
The power feed also changed with z390 I believe at least in the Asus models it did. The power feed of the 370 was "enough" to drive the newer 9700/9900 but there is a difference there that may impact enthusiasts. I don't think it enough to warrant an upgrade but something to consider.Also people should remember that while it is still a bit of a ways off, wifi is going to change to Wifi6 or 802.11ax starting now and probably seeing much of the changeover during 2019/2020 depending on adoption choices. And there is also pci-e 4.0 to consider next year probably that should be thought about before people do "marginal" upgrades from 370 era chipsets.
FXi - Monday, October 8, 2018 - link
Silly thing posted in edit window. Sorry power delivery and other points covered by you. Would have edited if I could have found that optionDanNeely - Monday, October 8, 2018 - link
Other things to look forward to in the next few generations are: Less-hacky USB3.1 implementations (eg this articles speculation that a 10g port will need to eat 2 HSIO lanes instead of 1, and still needing an extra chip to support USB-C). Spectre/Meltdown fixes in hardware. A reduced DMI bottleneck between the CPU and chipset (either just from upgrading the link to PCIe4/5, moving some of the peripheral IO onto the CPU, or both.Valantar - Wednesday, October 10, 2018 - link
Considering that the maximum theoretical bandwidth of PCIe 3.0 x1 is 984.6MB/s, you _need_ two PCIe lanes (and thus two HSIO lanes) for a USB 3.1G2 (1.25GB/s) controller unless you want to significantly bottleneck it. That's not "hacky", that's reality, even if this leaves a lot of bandwidth "on the table" if this only powers a single port (which it rarely does, though, and given that a full load on two ports at one time is unlikely, running two 1.25GB/s ports off two .99GB/s lanes is a good solution).Moving DMI to PCIe 4.0 will be good, though, particularly for multiple NVMe SSDs and >GbE networking.
DanNeely - Wednesday, October 10, 2018 - link
Splitting the traffic over 2 HSIO lanes is a hack because it'd require something to split/combine the traffic between the chipset and usbport. That in turn has me wondering if the speculation about the implementation being done that way is correct, or if the Z390 has 6 HSIO lanes that can run 10Gbps instead of the 8 that the rest top out at for PCIe3repoman27 - Thursday, October 18, 2018 - link
The implementation is absolutely not done that way. HSIO lanes are simply differential signaling pairs connected to a PCIe switch or various controllers via a mux. The PCH has a 6-port USB 3.1 Gen 2 xHCI, which can only feed 6 HSIO muxes. The back end of that xHCI is connected to an on-die PCIe switch which in turn is connected to the DMI interface. That DMI 3.0 x4 interface is already massively oversubscribed, but it is at least equivalent to a PCIe 3.0 x4 link, which is the most bandwidth that can be allotted to a single PCH connected device.Srikzquest - Monday, October 8, 2018 - link
HDMI 2.0 is available in Asus and Gigabyte's ITX boards as well.gavbon - Tuesday, October 9, 2018 - link
Thank you Srikzquest; updated the tables, obviously missed this yesterday :) - Thanks againHickorySwitch - Monday, October 8, 2018 - link
Correction:https://www.asus.com/us/Commercial-Servers-Worksta...
It says under "Specifications" that the board sports HDMI 2.0[b?]