The ASRock Z490 Taichi Motherboard Review: Punching LGA1200 Into Life
by Gavin Bonshor on May 27, 2020 9:00 AM ESTSystem 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, POST time and latency. This can come down to the manufacturing process and prowess, so these are tested.
For Z490 we are running using Windows 10 64-bit with the 1909 update.
Power Consumption
Power consumption was tested on the system while in a single MSI GTX 1080 Gaming configuration with a wall meter connected to the power supply. This power supply has ~75% efficiency > 50W, and 90%+ efficiency at 250W, 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 testbed 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.
*Due to some hardware going kaput, we ended up running these tests on a 1600W PSU, which means that the idle power is higher than users might expect and can flucuate by a lot with very simple voltage movements. We are in the process of sourcing a better power supply for our motherboard reviews.
The ASUS Z490 Taichi shows good power efficiency in all states, including full-load with our system pulling 202.7 W under load from the wall.
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 starts loading. (We discount Windows loading as it is highly variable given Windows specific features.)
In our POST time test, the ASRock fell a little in comparison to other models in test when booting into Windows 10. With unnecessary controllers such as network adapters and audio disabled, we managed to shave 0.7 seconds off the POST time when compared to the default.
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.
We test DPC at the default settings straight from the box, and the ASRock Z490 Taichi does very well in this area, marginally outperforming the other Z490 models on test.
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lmcd - Wednesday, May 27, 2020 - link
Honestly this is the most inane post I've ever read. Times haven't changed for the better, Raven Ridge support took over a year after the SoC was released. I own two Raven Ridge devices. I would know.Even when AMD support hits mainline, it's in such a late kernel version that you better hope this "sane" distro you're referring to is willing to backport support in an update.
Dunno what you mean about the Nvidia driver being painless to use. Its Wayland support is still comparatively unstable in Gnome and pushes KDE Wayland support from mediocre to bad. It also requires extra build tools.
I can't edit posts but I explained a key usage of nested Hyper-V. "Anyone who wants to use the Windows 10X emulator needs it unfortunately." There's also plenty of other features that use Hyper-V these days from WSL2 to Windows Sandbox, so the antiquated views on Hyper-V are also quite dated. Times have changed for the better, and Hyper-V is very much part of the present.
Congrats on your condescension though! It almost masks how wrong you are.
Dug - Wednesday, May 27, 2020 - link
Why in the world do you insist on benchmarking Non-UEFI POST Time when no one will use that?TheinsanegamerN - Thursday, May 28, 2020 - link
Because not everyone is you and there are those of us that DO use it. Wow, what an amazing thought.Dorkaman - Thursday, May 28, 2020 - link
I would love to see UEFI post time AND Windpows clean knstall boot time. My old Asus Rampage V Extreme was very slow (40s post+boot no mem test hybrid) and the new Asus ROG Maximus XII Extreme is also very slow.My Gigabyte Z390 Aorus Master posts+boots in 10+5 seconds.
Dug - Wednesday, June 3, 2020 - link
Why would you be buying new equipment for outdated OS's that aren't supported?If that's the case, the boot time is irrelevant, and my post still stands. Why even bother benchmarking it?
Ranger1065 - Wednesday, May 27, 2020 - link
A good read, always a pleasure to peruse Anandtech. The aesthetics are not for everyone but personally I think it's a nice looking board. Out of my price range but Z490 is not for me anyway. As to Asus boards, I have an older Z97 Maximus Hero VII and a Z390 Prime. Both great boards that have given me no significant issues.Jorgp2 - Wednesday, May 27, 2020 - link
Do the new CPUs have an additional 4x lanes from the CPU?I keep seeing boards that advertise 8,8,4 slots, with all of them coming from the CPU. And this motherboard for example that has the 4x gen 4 M.2, when the chipset does not have Gen 4
MDD1963 - Wednesday, May 27, 2020 - link
The specs I read said the top GPU slot would be capable of PCI-e 4.0 x16, ...and one of the M.2 slots...( perhaps I missed where it said all 4 might be capable fo PCI-e 4.0 x4 operation?_)Even with the aforementioned limits, more than enough for 99% of most folks....
Spunjji - Thursday, May 28, 2020 - link
Waiting to see how many people show up to the comments to wail about the tiny fans. After all, it wasn't anti-AMD sentiment that caused so many folks to show to all of the articles related to X570 boards (and a few that weren't) and do that, it was totally neutral concerns about longevity and noise.(Full disclosure - I am fully on-board with not wanting tiny fans on a motherboard... just feeling a little amused by the asymmetry of this. The only comment here so far on this topic has been a sensible one, not hysterical ranting.)
TheinsanegamerN - Thursday, May 28, 2020 - link
So you smugly, disingenuously re-categorize the arguments of others and think you're...clever? Funny? Intelligent?Now, here's points for asrock that might blow your mind, these are STANDARD FANS. You can go buy brand new noctuas to replace these and silence them while maintaining cooling performance. Guess what you couldnt do with x570 chipset fans? These fans also dont spin 24/7, only when needed, and the VRMs here get a LOT hotter then the x570 chipset did.
If X570 got into the 90C range without the active cooling (it doesnt) and they used standard 40mm fans (they dont) then the complaints would be baseless. But we saw how necessary those x570 fans really were. And oh hey, there are plenty of Z490 mtoherboards that dont use VRM fans! Just like that whole 1 X570 motherboard that cost like $700!