Question Newly built PC fails to boot only at first startup of the day ?

[LabrieD]

So I recently rebuilt my PC with almost entirely new parts save for the storage (3 SSD's + 1 HDD) and OS and it's been failing to post only the first time of the day I start it up (VGA & BOOT lights). If I restart it, everything boots perfectly fine it runs everything excellent afterward even if I shut down and boot up again.

Specs:
CPU: AMD Ryzen 7 9800X3D 4.7 GHz 8-core
Cooler: Thermalright Phantom Spirit 120 SE
Mobo: ASRock B650 Steel Legend Wifi ATX AM
RAM: Corsair Vengeance 32 GB (2x16 GB) DDR5-6400 CL32
Storage: Western Digital Black SN850 1 TB M.2 (Hosting Windows 10 Home OS)
Samsung 970 EVO 1 TB
Samsung 860 EVO 500 GB
Seagate BarraCuda 4 TB Internal HDD 3.5 Inch
GPU: XFX RX-79GMERCB9 Radeon RX 7900 GRE 16GB
PSU: be quiet! Pure Power 12M 750W 80+ Gold Certified
Case: be quiet! Shadow Base 800 FX ATX Mid-Tower

I know the Mobo isn't natively compatible with the 9800X3D, so I did the bios update using the button on the IO panel via USB and confirmed it's properly running the latest Bios version now (3.16).
Regarding the VGA light I've tried re-seating the GPU twice now, power cables and all, and it's running the latest drivers, so I'm not sure what else to check. It runs like a champ even under high load (120-240 FPS in Helldivers 2, ZZZ & FFXIV on max settings) after the first restart following the initial failed post test.
As for the BOOT light, I've ensured all of the prior OS data & partitions were wiped from the older SSD's I'm using for storage now and reinstalled windows 10 on the main SSD. I've tried running the system file checker and it didn't find anything post-OS re-install.
I've discharged the CMOS battery, tried disabling fast boot in UEFI, changed out the monitor cables and recent did a full tear-down & re-installation minus the CPU & cooler. Still the same thing.

It's been super difficult to test because I can only replicate it by waiting until the next day so I'm a bit at a loss of what to look into next.

 

[Darkbreeze]

Ok, so I know you updated the BIOS, BUT, did you also do a hard reset of the BIOS to reset the hardware tables? It's not always required, but in some cases it absolutely is otherwise the BIOS refuses to "forget" some of the settings that were relevant only to the old hardware. This is the first thing I would try, EXACTLY as outlined.

BIOS Hard Reset procedure

Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply.

Remove the motherboard CMOS battery for about three to five minutes. In some cases it may be necessary to remove the graphics card to access the CMOS battery.

During that five minutes while the CMOS battery is out of the motherboard, press the power button on the case, continuously, for 15-30 seconds, in order to deplete any residual charge that might be present in the CMOS circuit. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out.

If you had to remove the graphics card you can now reinstall it, but remember to reconnect your power cables if there were any attached to it as well as your display cable.

Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary.

Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP, A-XMP or D.O.C.P profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS.

In some cases it may be necessary when you go into the BIOS after a reset, to load the Optimal default or Default values and then save settings, to actually get the hardware tables to reset in the boot manager.

It is probably also worth mentioning that for anything that might require an attempt to DO a hard reset in the first place, IF the problem is related to a lack of video signal, it is a GOOD IDEA to try a different type of display as many systems will not work properly for some reason with displayport configurations. It is worth trying HDMI if you are having no display or lack of visual ability to enter the BIOS, or no signal messages.

Trying a different monitor as well, if possible, is also a good idea if there is a lack of display. It happens.

If that fails to correct the issue, what is the exact model of your memory kit and are you CERTAIN that it is running at it's profile configuration when in Windows and not reverting to it's default JEDEC baseline configuration after the first failed boot/training of the day?

Honestly it sounds like maybe it's a board issue where there is a tenuous solder or other connection on one of the relays or caps but after it's been on a few minutes it warms up enough to make an adequate contact. This could also be the issue but related to ANY other piece of hardware. Graphics card, PSU, memory, anything that uses electrical traces, solder points, etc. and might have to "warm up" before it will boot.