jason9755
Hi B0baganoosh,
 
I appreciate your help and it worked! I just replaced the cmos battery and I'm not booting to bios with random errors.
 
@EVGA For future reference please don't make it so involved to replace the cmos battery. I had to completely dissemble the motherboard, remove the metal back cover from the motherboard just for one standoff screw from the back side of the cmos cover. I believe the 2 top screws that are on the cmos cover would have been sufficient.  
 
Thanks again. 

Wow, that's nuts. I am going to have to look and see where they buried that sucker on the Dark mobo. I hope it is not the same way.

I too had this issue.
 
For three months since I bought and installed this Z690 Classified, I have been confounded by having the Setup screen appear nearly every reboot or cold startup. The exceptions when it would go straight to the Windows login screen were very rare. I often use the PC remotely and would be frustrated every time there was a power failure at home (there have been at least a half dozen planned and unplanned since that time) because I’d come home to find the PC had automatically started up again yet was sitting on the setup screen with the message about memory being changed, VMD control or a CPU change. And nothing had ever changed physically or in software in between reboots/shutdowns.
 
I wrote EVGA support two weeks ago, before I found this thread. Their suggestions were: replace the stock CMOS battery and/or try a different PSU. The PSU seemed like the worse of these two evils, so I put off doing anything at all until tonight when I found this thread. Little did I realize that upon discovering how to replace the CMOS battery, I would want to curse the reproductive organs of the mother of the engineer who decided where to place the battery (and how it was shielded) and how easy *coughs* it would be to replace it. I don't usually curse EVGA but they got a tongue lashing for this entire exercise.
 
On the bright side of things, like for the many who had this issue and also saw it resolved, I am now in your club. I thank you for the feedback, because it helped incentivize me to changing the battery tonight – something I surely did not want to do once I learned what it was going to take: basically, a complete teardown and rebuild.
 
Now, if only they’d redesign the backplate so the motherboard would fit flush into/onto my DG-87 case. Unfortunately, the case’s standoff for the upper right mounting screw is shaped in a way (imagine a volcano) that the side of the standoff (volcano) abuts into the backplate, thus preventing a flush mount and completely prevents using the mounting screw. I do not have the tools or confidence to get (buy) a Dremel or other metal cutting tool, let alone the patience to disassemble the PC once again, so it will remain my little secret. Well, mine and this forum’s now. I don’t mean to thread hijack, but I’m wondering if anyone else found this problem or if I should post a new thread about it (either in Cases or Z690) to ask there.
 
So, thanks once again to all of those who contributed here, and I hope that anyone else who runs into this problem can also have the same confidence and success with the solution that was offered and that I used. And btw, I did not need to replace the PSU.

Hopefully the new motherboard solves your problem. It still happens for me but only during a cold boot, if I restart no boot to bios.