That message is valuable, it's telling you that none of the changes you made in BIOS are sticking with a reboot. It's reverting back to defaults. Seems to be a common problem with HP G2, G3, G4 models.
Did you install a new CMOS battery before the install ? If not you can check what you've got with a multimeter or a coin cell battery tester. If the battery is ok (at least 3.2v or more) then it will likely require an RTC patch/fix.
@sonicman66 may be able to elaborate on this topic. I'm not currently using any HP desktops presently.
Here's the patch that many HP owners have added to their OC config.plist. RTC IRQ 8.
View attachment 558472