GA-Z270X Gaming 7, is this reboot normal?

[Phroster]

I just installed a GA-Z270X, and when I reboot the whole sytem it shuts down for 2 sec.
And then normally reboots.

But it doesn't keep the power on during a reboot, it is almost like the PC is turned off/on instead of a reboot where the power stays on.

Is this normal for this motherboard?

[shadowsports]

Greetings,
This is a hard question to answer.  The short answer is no, the system does not shut off when you restart (warm boot).

To some however, the system reset that occurs might appear like the system has powered off and restarted.  I'm not doubting what you are seeing, but other factors like your power supply might be influencing what you are experiencing.  Hard to say without being able to see it.   

[Phroster]

I actually found that if I  "load optimized defaults"

The system does a normal warm boot.

But as soon as I change settings under the chipset tab, LAN controller and virtualization.
The system doesn't do a normal warm boot anymore.

Also if I shutdown the system.
And then turn it on again, after it worked normally.

The reboot problem returns and I have to load optimized defaults again to fix it.

But the problem returns as soon as I do a shutdown and reboot after that.

So if my PSU was the problem, why would it work, only until I change a setting that has nothing to do with power settings. And after a cold boot, this seems like a BIOS issue to me.

[shadowsports]

It could very well be a BIOS issue.  It might also be influenced by your hardware configuration as I said earlier.  We know nothing more than what MB model you have.  I did some additional reading and found something relating to W10 and hybrid shutdown. 

What is your reasoning for disabling these options?

[Phroster]

My PSU is quite old, so I'm going to replace it. (6 years)

I also wanted to disable these options just to have less devices consume resources.
That shouldn't be a problem causing such an issue.

But my PSU might be the issue. If that doesn't fix the issue. I really don't know what else to do.

The system is pretty standard.

GA-Z270X Gaming 7 (F5 BIOS)
i7 7700k 4.6ghz
Corsair LPX 4x8GB 3200mhz
Samsung Evo 960 1TB
Asus strix Geforce 980ti
No other peripherals.

I also tried without OCing, and removing all HDDs (sata).
The issue persists, unless I do optimized defaults. And that only works until the next cool boot.
Even when not changing any settings in BIOS.

[shadowsports]

My PSU is quite old, so I'm going to replace it. (6 years)

I also wanted to disable these options just to have less devices consume resources.
That shouldn't be a problem causing such an issue.


GA-Z270X Gaming 7 (F5 BIOS)
i7 7700k 4.6ghz
Corsair LPX 4x8GB 3200mhz
Samsung Evo 960 1TB
Asus strix Geforce 980ti
No other peripherals.

With those specs...  (i7, 32 GB ram, SSD & 980Ti...  I can't see how you would be worried about resources

[Phroster]

So I replaced my PSU (Coolermaster 850v).

Still the same issue.

I also tried booting without GPU card installed, only with onboard GPU.
And tried with only 1 RAM DIMM inserted.

Also, I wouldn't really notice this shutdown when rebooting, if I didn't have mechanical HDDs installed which make noise when turning on/off.
But also the fans and LEDs go out for about 2 sec.

So I'm wondering if this is actually normal behavior.

The system is 100% stable no crashes or problems during the first 5 days.

Any ideas ?

 

[oo0filthy0oo]

I had this exact problem. I am not a pro so i can only tell you what i found with my case.

It had nothing to do with hardware, but was purely a bios problem. If your bios is setup wrong when your machine boots it will fail and then reboot with the default settings. Basically machine boots for 1 second, powers down for half a second and then boots normally.

The fact that your machine boots fine when set to default, backs this up.

For me, if i remember correctly it was my Ram clock speeds that were wrong. For you it could be something different. The way i found out was setting everything to default and then changing them one by one.

Hope this helps

[Phroster]

The boot doesn't fail.
The system boots with all the settings.
And doesn't reset anything.

It just doesn't perform a normal warm reboot.

During restart, it goes off for 2 sec, then boots normally, everything still working, all settings still there.

The strange thing is, that if I do optimized defaults, then set everything how I want it, it works fine.
Until a cold boot. And the problem returns.

[shadowsports]

Gave this some additional thought last night.  See my post from the 26th.  Next things to look at. 

Fast boot / Ultra Fast Boot.  Are you using these settings in BIOS or in conjunction with the App Center Utility in the OS?

I believe these settings are disabled when Defaults are loaded which could change the behavior of cold boot.

My recommendation is you don't need either of these if you are running a m.2 or SSD.   

[kamikazee]

I have exactly the same problem and I have been pulling my hair out trying to work out why. This is a new build only 2 months old. Same board, Z270X Gaming 7.

This behaviour started happening after updating from F4 bios to the latest F5 bios. As OP states, upon rebooting, the system shuts off only for around 2 seconds and then the power and lights flick back on and continues the rebooting process. I have no other issues in terms of the PC running. Just this strange behaviour. The PC boots fine and operates normally. This DID not happen on the F4 bios, and my bios settings including XMP are identical.

Again like OP states, if running BIOS at optimized defaults this doesnt happen.

I did some trial and error testing and changed my bios preferences one thing at a time and I found that the XMP profile seems to cause this strange issue. Fast boot or other settings even Power loading, seem to make no difference to this behaviour. But as soon as XMP profile is turned on, this happens. Without it the system reboots perfectly normal and the power stays on during the restart process.

As I said this did not happen with F4 bios, Im now kicking myself for upgrading but how was I to know.

I hope gigabyte are aware of this issue and fix it with the upcoming updates. Unless someone else knows a workaround?

The XMP instability issues were present with the first few bios versions but F4 has been the most stable so far.

The other issue is you CANNOT roll back from F5 bios, it prohibits it.

Now the fact the OP also is running F5 bios proves this is some sort of bug that has been introduced in the F5 bios. I'd like to hear from GIGABYTE on this.

Any ideas?

[shadowsports]

Certainly helpful when someone else with the same board and BIOS rev experiences the same issue.  A support request should be open with Gigabyte to ensure visibility. 

[Phroster]

Thanks for all the suggestions and replies.

I actually also found out that, if I use the XMP profile (3200mhz). The problem indeed occurs.
Even when manually setting all the timings, and voltage.

When I put the memory in a lower frequency (2666mhz)
The problem is fixed.

I also looked in the memory compatibility list. And my memory is not on it. (CMK16GX4M2B3200C16)
Although other memory kits from the same series (Corsair LPX) are on the list.

So at least I have found the problem, but I would really like to use the memory in 3200mhz.

By the way fast boot is off, also tried memory booting settings (normal, fast and disabled).

[Phroster]

Sorry for double posting.

But I downgraded to F4. With Intel FTP tool.
This is kind of risky. And not supported. But it worked fine.
You can't downgrade through Q-flash, but this works.

I made a bootable USB, got the newest Intel ME System Tools v11.6 r10.
Put FPT.exe (DOS version) and the F4 bios on it.
Renamed the BIOS file to, bios.bin.
Boot from USB.
Run fpt.exe -f bios.bin in DOS.
It loaded for about 2 mins.

Afterwards the BIOS was back to F4.
I reflashed again with Q-Flash to be sure, but the backup BIOS seems to be still F5.
But that's no problem. As long as the main BIOS is now F4.

And indeed this fixed the issue.
I can now cold boot and reboot with no issues. And use the XMP profile (3200mhz)

I'm glad it's fixed now, but should we make a support ticket? Or is it possible you put this through the proper channels
shadowsports?

[kamikazee]

I lodged a support ticket with Gigabyte.

I read about the FPT tool but yeah it is risky, I'm more concerned about what people were saying about the MAC address being overwritten or something. Not sure if I want to try that just yet. Did you have to back that up? Also where did you download the tool from I did a quick search but couldn't find anything clear.

I also use Corsair memory, the Vengeance CL15 LED 3000mhz. Not sure if its supported or not but I had no issues at all on F4 bios. So bloody annoying that it can't be rolled back.

Also is there a way to check what bios is on the backup without having to flick the physical switch?