Gigabyte Z890M Gaming X always boots into BIOS after shutdown

[CopperKiDD]

Hey guys,

got a weird issue with my Gigabyte Z890M Gaming X (actually seen it now on two boards of the same type). Basically every time I shut the PC down completely, the next time I power it on it doesn’t go straight into Windows, it drops me right into the BIOS screen.

If I just do a normal Windows restart everything is fine, no BIOS, it boots the OS like it should. But as soon as the machine was really powered off (like overnight), next morning I’m greeted by the BIOS again before I can boot into Windows.

I already tried the usual stuff:

cleared CMOS / BIOS reset

updated BIOS (currently on F17f)

checked all the obvious boot settings

Doesn’t matter what I do, the problem is always there. Same behavior on both boards I own, so I don’t think it’s just a single faulty unit.

Anyone else with this board seeing the same thing? Or any clue what might cause it?

Any ideas would be much appreciated, this is driving me nuts. Thx

[dmdilks]

When you power down at night do switch off the power switch on the power supply?

Do you have to make any changes in the bios when this happens or just exit and reboot?

I know you are having same problem with the two boards. But did you check to see what the Voltage on the batteries?

One last thing how many bios updates have you done on the boards?

I'm still old school and after I do a bios update. I let it reboot to the Logo screen and then I shut it down. I pull the battery and set the jumper for a few minutes. Then I remove the jumper and put the battery back. Then I reset up the bios.

That way there isn't anything weird going on with the bios. 

[CopperKiDD]

Thanks for the reply!

No, I do not have a power strip with a switch or anything like that, and I also never turn off the power supply itself. The PC is always plugged in and has power. When it goes into BIOS I do not have to change anything, I can just exit and then it boots Windows like normal. Nothing gets reset, the time and all settings stay fine, and I already checked the battery voltage too, looks good.

I also did a CMOS reset before but that did not change anything. As for BIOS updates I only did one right after buying the boards to get them both on the latest version.

That is the strange part, it happens on both boards with the exact same hardware, CPU, RAM and GPU all identical. So it does not really feel like a one off problem with a single board.

[dmdilks]

You can give this a try. Go into control panel and click on power options.

To the left click on "choose what the power buttons do".

Uncheck the box next to turn on fast startup.

See if that helps your problem.

[CopperKiDD]

Thanks for the tip. Fast startup was actually already disabled on my system. I tried enabling it and then disabling it again just to be sure, but unfortunately it made no difference. The issue is still the same.

[dmdilks]

Did you try this enable CSM (Compatibility Support Module)

[CopperKiDD]

Looks like I may have found the problem. I went into the BIOS and enabled Fast Boot and also Windows fast startup. Then I let Windows boot up once and did a full shutdown. After that I disabled fast startup in Windows again (including hiberfile.sys) and also turned off Fast Boot in the BIOS.

Since then I have powered the PC on several times and it no longer drops me into the BIOS. So it seems this board does not really like Fast Boot all that much.

My setup is nothing exotic: RTX 5070, two 16 GB G.Skill DDR5-6400 sticks, Intel Core Ultra 7 265KF and a Samsung EVO 970 Pro.

I tried this on both of my Z890M Gaming X boards and it worked the same way. I will report back if anything changes.

[shadowsports]

Nice that you figured it out.  I initially thought something (hardware) was failing POST.  Not that something was defective, instead something that was conflicting with the BIOS, graphic card firmware, memory timings, etc. 

It seems however something in the hiberfile might have been flagging the BIOS on cold boot.  Good job with the troubleshooting. 

@Dave (dmdilks) great idea about disabling Fast Start Up.  I considered the same.