The ASUS Z370-I Gaming Review: Mini-Me Mega Motherboard
by Joe Shields on May 21, 2018 11:00 AM EST- Posted in
- Motherboards
- Intel
- Mini ITX
- Asus
- Coffee Lake
- Z370
- Z370-I Gaming
System Performance
Not all motherboards are created equal. On the face of it, they should all perform the same and differ only in the functionality they provide - however, this is not the case. The obvious pointers are power consumption, but also the ability for the manufacturer to optimize USB speed, audio quality (based on audio codec), POST time and latency. This can come down to manufacturing process and prowess, so these are tested.
Power Consumption
Power consumption was tested on the system while in a single GPU configuration with a wall meter connected to the Corsair HX 750 power supply. This power supply is Platinum rated. As I am in the US on a 120 V supply, leads to ~87% efficiency > 75W, and 92%+ efficiency at 375W, suitable for both idle and multi-GPU loading. This method of power reading allows us to compare the power management of the UEFI and the board to supply components with power under load, and includes typical PSU losses due to efficiency. These are the real world values that consumers may expect from a typical system (minus the monitor) using this motherboard.
While this method for power measurement may not be ideal, and you feel these numbers are not representative due to the high wattage power supply being used (we use the same PSU to remain consistent over a series of reviews, and the fact that some boards on our test bed get tested with three or four high powered GPUs), the important point to take away is the relationship between the numbers. These boards are all under the same conditions, and thus the differences between them should be easy to spot.
The Power Consumption tests show the Z370-I Gaming's power mixing in nicely with the other results in both idle states using 41W in long idle and 45W in OS idle. The load test shows the board using the least power so far by a very small margin at 137W.
Non-UEFI POST Time
Different motherboards have different POST sequences before an operating system is initialized. A lot of this is dependent on the board itself, and POST boot time is determined by the controllers on board (and the sequence of how those extras are organized). As part of our testing, we look at the POST Boot Time using a stopwatch. This is the time from pressing the ON button on the computer to when Windows 10 starts loading. (We discount Windows loading as it is highly variable given Windows specific features.
POST times for the Z370-I Gaming were the fastest we have seen so far on this platform, coming in at 21.1 seconds with the BIOS at default and 20.3 seconds stripped. In fact, both ASUS boards so far have the fastest boot times on this platform.
DPC Latency
Deferred Procedure Call latency is a way in which Windows handles interrupt servicing. In order to wait for a processor to acknowledge the request, the system will queue all interrupt requests by priority. Critical interrupts will be handled as soon as possible, whereas lesser priority requests such as audio will be further down the line. If the audio device requires data, it will have to wait until the request is processed before the buffer is filled.
If the device drivers of higher priority components in a system are poorly implemented, this can cause delays in request scheduling and process time. This can lead to an empty audio buffer and characteristic audible pauses, pops and clicks. The DPC latency checker measures how much time is taken processing DPCs from driver invocation. The lower the value will result in better audio transfer at smaller buffer sizes. Results are measured in microseconds.
Our DPC latency results for the Z370-I Gaming reached 277 µs placing it in the middle of some varying results.
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Chaitanya - Monday, May 21, 2018 - link
Price premium for the compact build just doesnt justify the cooling compromises that mini-ITX brings to the table especially for people living in hot climatic regions of the globe where ambient temps can cross 40Deg C.jordanclock - Monday, May 21, 2018 - link
And...? So this one product might not be suitable for people using tiny air cooled cases in warm places? And who are you to say what is and isn't justified for different people? Liquid cooling pretty much negates the space issues. Also a mini-ITX board does not need to be used in a mini-ITX case.tarqsharq - Monday, May 21, 2018 - link
Yeah, it seems odd to complain about cooling problems when you're already at 104F... might want to invest in AC at that point or just get a massive case with tons of fans, not conducive to ITX at all!MDD1963 - Monday, May 21, 2018 - link
"Also a mini-ITX board does not need to be used in a mini-ITX case."I'm sure there's at least one tard looking to stuff one into Corsairs largest ATX doublewide case right now....
meacupla - Tuesday, May 22, 2018 - link
Do you mean the Obsidian 1000D? Because that case has room for an E-ATX and mITXSamus - Thursday, May 24, 2018 - link
Haha that's exactly what I was thinking. Dual PC's in a PC!Joe Shields - Monday, May 21, 2018 - link
I'm not sure what one has to do with the other. One isn't paying a premium for the cooling, or less of it - that simply comes with the territory of the Mini-ITX board in general.Clearly, if one is living in such an area where your inside temperature is 40C, additional cooling considerations are likely warranted, almost regardless of the build size. I do not understand the root of that comment...
Chaitanya - Monday, May 21, 2018 - link
One of the main selling point of Mini-Itx motherboards is smaller and compact PC builds and thats how both motherboard and case manufacturers have been marketing it. So if you want to take full advantage of smaller system then going the route of smaller Mini-Itx cases is necessary which means a restriction on size of cooler that can be used. And using tower style Itx cases defeats the purpose as one can easily go to micro Atx form factor without increasing the volume of pc case too much.Ratman6161 - Monday, May 21, 2018 - link
I guess we can, or at least should, agree that there isn't a one size fits all and that Mini-ITX in general falls into the "not for everybody" category. Then again, If I built my wife a system in a mammoth full tower case, I'd probably be getting some very dirty looks to...so that is also a "not for everybody" sort of build.All that said, this article is actually a motherboard review. I am personally interested in a Mini-ITX build, but for a more mainstream, non-gaming sort of system. so what I'd like to see is a different article that addresses Mini-ITX in general and the issues, pros and cons surrounding it; selecting components that fit in a reasonable case, coolers that fit etc. One thing I would have liked to have seen in this particular article - even though its a motherboard review - is what it looks like actually mounted in a case and using components one might actually be able to fit in such a case. Notably, the GTX 980 isn't something that you could actually use in a Mini-ITX build so why benchmark with it? Or am I wrong about that?
Ratman6161 - Monday, May 21, 2018 - link
Just looked again. Ditto on the power supply and dual 120MM cooler. If they wouldn't fit in a Mini-ITX case why use them for testing the motherboard intended for such a case?