Maximus X (Z370) boot question

[mojothehut]

Hey all
I recently built a new rig with an Asus Maximus Hero X

Everything is peachy. But I notice something odd after it's been powered completely down and I go to start it up. After hitting the power button, the fans spin and lights come on, then off, then back on about 1 second later then it boots up fine. Its like a weird double boot or something. I've ran the system and stress tested it for days, nothing is wrong, everything while its running is fine.
It's just that weird quick power on and off before continuing a normal boot that is wigging me out a bit.

Anyone have any idea if this is normal for this chipset/motherboard?

Rest of system if it matters.
i7 8700k
16gb 3200, 14-14-14-34-1T
Samsung 960 Pro 512gb
EVGA Supernova G3 750w psu
EVGA 980ti Classified
Win10Pro

 

[UsandThem]

My motherboards do that when I cut power to them, and go to first boot them (both my Asrock and Gigabyte board).

Maybe someone who knows exactly why they do that can chime in, because I don't cut power to them unless I am upgrading a part, I've never looked to see why exactly they do that. Probably something to do power settings in the UEFI, or some type of over-volt/surge check. Heck, now that I typed this out, I'm curious now too.

 

[UsandThem]

I found this:

https://rog.asus.com/forum/archive/index.php/t-49146.html

2) Training parameters are stored in NVRAM - so CPU does not need to be in the socket. The settings applied at CPU change, battery removal or CMOS clear revert to safe (training for such situations is easy and parameters are chipset defaults which don't require a "double latch" to apply).

3) In short, the double BOOTs are present because they have to be - not because we do it on purpose to nark users. Sorry if it bothers you but nothing can be done about the way certain things have to work. If we try and circumvent this, bad things can happen. Those being, inability to post at overclocked settings from AC power cycle, instability and or some devices not being picked up (USB, onboard controllers). The former two need an essay to explain and require the user has a background in electronics, understanding of digital systems and signal integrity. Not easy to explain in a way that makes sense to the masses.

I'll cite one crude example. During development of one platform we found certain CPUs would not POST from power cycle if certain parameters were set. Our only option to get the CPUs to POST was to either force the end user to load a default profile at each AC power cycle, then go back into UEFI and apply the OC (after which there would be a double-cycle anyway) or to allow the system to double cycle. While both are a pain in the proverbial backside, it's obvious which we had to choose. It's situations like these and how the chipset works with certain embedded technologies that create problems.

We use dedicated micro-controllers with custom coding to get around as much as we can, to make user experience seamless. There is however only so much we can do.

And this:

https://forums.overclockers.co.uk/threads/power-on-problem.18478386/

 

[vailr]

There should eventually be a bios firmware update, for the Intel Spectre/Meltdown security problem.
So: look for one that's dated Feb. 2018 or later, and (perhaps?) a fix for the double-boot issue might also be included.
https://www.asus.com/us/Motherboards/ROG-MAXIMUS-X-HERO/HelpDesk_BIOS/

 

[mojothehut]

Im sticking with the pre meltdown bios. I'll just deal with the double boot thing, sounds like its
more or less harmless anyway. Avoiding the Spectre/Meltdown bios because of reports
of performance loss from it. My computer isn't used for anything but gaming anyway. I dont even pay bills/bank
from it. So I'm not really worried about Spectre/Meltdown. Would rather have performance than security lol

 

[vailr]

Im sticking with the pre meltdown bios. I'll just deal with the double boot thing, sounds like its
more or less harmless anyway. Avoiding the Spectre/Meltdown bios because of reports
of performance loss from it. My computer isn't used for anything but gaming anyway. I dont even pay bills/bank
from it. So I'm not really worried about Spectre/Meltdown. Would rather have performance than security lol

AFAIK, the only reason for experiencing "performance loss" would be when using an unpatched bios firmware and with the MS Windows mitigation patch. After the bios has been correctly patched with a CPU microcode update, there would be more or less "full performance" restored.
http://www.majorgeeks.com/files/details/inspectre.html
"InSpectre" (free software) can show the current status of both factors: bios firmware + Windows mitigation software, and how each affects the system speed. It can also enable/disable the Windows mitigation software factor.

 

[mojothehut]

Oh wow, thanks for that link. That little tool is cool.
According to Crystal Mark, my SSD performance has improved since disabling the protection
neato