ACPI BIOS contains a _PRW, _PR0, _PR1, _PR2 or _PR3 object which is not a package. Asus Prime z790

[SaltyGame]

Hello,

Lately I've been experiencing system instability, specifically my system hangup /freezes requires hard shutdown for it. I've reinstalled the OS multiple times (clean installation), tested my GPU/VRAM, Memtest the RAM, tested my CPU, disconnected displays and changed display cables.

I've installed the same updated BIOS twice now just in case and removed all the undervolt. This issue is more frequent on Monster Hunter Wilds but in any case i don't see how a game should crash my whole system instead of crashing the application itself.

In any case i've been debugging the event viewer logs and there's a single error i cannot seem to fix.

: ACPI BIOS contains a _PRW, _PR0, _PR1, _PR2 or _PR3 object which is not a package. No further action is necessary; however, you should check with your computer manufacturer for an upgraded BIOS.

With every clean installation of windows 11 i install chipset drivers, ME drivers, etc... But nothing seems to fix this error that show up on booting to desktop.

At this point im considering the Motherboard is faulty since i have also experienced crashes when trying to disable/uninstall an audio device (from dualsense controller) using device manager and the system hanged up, same thing happened yesterday when i finished cleaning up old files using windows clean up files application (including old drivers).

Any help or guidance is welcome, thanks in advance.

[SaltyGame]

By enabling USB Host Controller and according to that BIOS feature, Windows doesn't manage the ACPI devices poer delivery throwing that errors. Just answering this according to my own trial and errors test. This is not an answer to the issue, since yet i have to test stability, at hand but at least it solves these ACPI errors in Event viewer for me.

[Jiaszzz_ROG]

Hello @SaltyGame 

Thank you for reaching out to us.
Could you kindly confirm whether you are still experiencing the described issue? Is your motherboard model PRIME Z790-A WIFI-CSM or PRIME Z790-P D4-CSM, and which BIOS version are you currently in?
After clearing CMOS, if you enter the system without making any BIOS modifications, does the issue still persist? Aside from Monster Hunter Wilds, have you encountered instability in any other usage scenarios? If the issue is game-related, have you ruled out thermal concerns or cooling efficiency?
Would you encounter crashes or other abnormal behavior after removing all the SSDs and HDDs, then clearing CMOS and booting into the BIOS? If the problem only occurs within the system, we recommend cross-testing with a new system drive to help isolate potential hardware issues.

Thank you.

[SaltyGame]

I was, even after fixing the errors showing up in the event viewer related to ACPI devices i still experiences system hang up during MHWilds.... and even outside of it meaning the system being idle or low workload. I'm using the PRIME Z790-A WIFI. I didn't clear the BIOS by clearing the CMOS but i did defaulted the BIOS configuration. I'm using the latest 1805 BIOS version which installs the INTEL microcode, i installed it as soon it came out (at least within the week of release).

I ruled out thermal issues given both my CPU and GPU don't exceed even 80c in their core package.

BUT so far i've found certain stability since i have yet to experience a system hang up even while playing Monster Hunter Wilds, and that is i removed a RAM stick and going single channel instead of dual channel. I've also set up low latency-mode on and just for monster hunter wilds power management to maximum perfomance, this was all done via nvidia control panel. Since i've tested with both stick in the DIMM2 slot and both working fine i'm starting to believe is related to MOBO (maybe some BIOS setup) or CPU.

I will proceed testing by restoring the BIOS to factory setting and see if that helps.

[SaltyGame]

Since Friday of last week i've had a stability that surprised me and it started when i removed one stick from the DIMM4 slot, this whole week i havent had any system hang up, crash up or BSOD... until today. During the weeb i performed memtest, changed memory sticks and experienced no errors again until today where i proceeded to clear CMOS and even change the RAM sticks but still experienced system hang up/freezes back to back. Not sure if it was pure coincidence but before hand i ordered a new motherboard and i should be able to confirm or resume testing on Monday.