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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Peskarik - Thursday, May 28, 2020 - link
Big thanks for the explanation, BGentry.Samus - Thursday, May 28, 2020 - link
Asus is a large OEM manufacturer and just doesn't make anything interesting anymore. That isn't a bad thing, except for innovation.Ian Cutress - Wednesday, May 27, 2020 - link
ASUS defaults to Intel recommended settings for turbo and voltage, and gives users the option to increase these in line with ASUS recommendations to get the best performance. The other manufacturers simply operate with their recommended settings out of the box, hence longer and higher turbos.Note that Intel actually encourages vendors to set their own turbo length and turbo power - what Intel provides is recommendations, but as long as the MB vendors aren't actually overclocking the frequency, they don't particularly care.
We typically test with out-of-the-box settings, to give a sense of what performance that users without any knowledge of what a turbo power limit is should expect. Given ASUS' implementation, it means they fall down on this metric, which makes it appear if the board is worse. What we should have done in this case is posted both sets of numbers and specified the difference, which is our fault. How ASUS does their options is going to be the focus of our Hero review.
rahvin - Wednesday, May 27, 2020 - link
Thanks for the comment Ian. I always do my own setting so I never noticed this, I'm glad you brought it to attention.Peskarik - Thursday, May 28, 2020 - link
Thank you, Ian! I look forward to it. For my next system I would like ASUS board + card, just to be sure all drivers etc are in line, that is why I am looking at the performance of ASUS boards in particular.Byte - Wednesday, May 27, 2020 - link
I used to only buy Asus, but i keep hearing crappy things about their ROG lines. To get similar features cost almost double in the current ROG lines vs Giga or MSI.Seems like the lower Asus lines are ok. What are you guys experiencing?
khanikun - Tuesday, June 2, 2020 - link
I got away from Asus. I stuck with them for like 10 years, but in the later years, my Asus boards kept breaking. I swapped to their WS line, which worked for a while, but then it seems they turned crappy too. They'd die in 1 to 1 1/2 years. Maybe I'm just super unlucky with Asus. I just gave up on them and moved to Gigabyte.Kind of makes me wish Abit was still around and was like their old heyday in the early 2000s. I had a good like 6-7 year run on my old IC7-Max 3 board, until the caps started leaking.
PeachNCream - Wednesday, May 27, 2020 - link
Gotta love how the word "Taichi" totally matches well with the whole brass cogs and gears theme plastered all over the plastic coverings they use to hide the PCB for - well who knows what reason. PCBs in computers must be considered ugly or something. Next stop, PCB-free, RGB-equipped windowed desktop computers!!!Deicidium369 - Wednesday, May 27, 2020 - link
When Jobs started NeXT - even the motherboard went through the aesthetic department.I support removing polychlorinated biphenyls from desktop computers - almost as insidious as RGB Disco lights. Windows are for cars, boats, airplanes, houses and not for PC cases.
I rather like the look of printed circuit boards in PCs - and the idea that you have several billion precision manufactured features in every CPU.
YB1064 - Wednesday, May 27, 2020 - link
ASRock have come a long way. I used be an ABit guy before latching on to ASUS up until Haswell. I had the opportunity to get a great deal on ASRock's Supercarrier Z270 paired with a 7700K. Superb board, tons of features, stable and overclocks quite well (5.1 GHz all cores with no effort).I must say, I miss the glory days of overclocking, i.e. tweaking the hell out of a DFI NF4 + TCCD + BH5 and employing crazy sh!% like the OCZ DDR booster.