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User manual available from Support. I keep a copy on the Desktop for all the household boards.

My Rampage VI X299 7900X Apex has no use for BAR since it has 64GB RAM and a Radeon VII with 16GB. Wifi, BT, Onboard NIC is disabled.
With a Hyper X16 card I run 8 1&2 TB PCIe 3/4 NVME drives...

Did you check ASUS Support for your board?

The drives on the Dimm.2 would end up being mounted on the raid card unless additional drves were purchased.

You should be able to set them up as a Windows Raid array, just not bootable though.
If you want to have a non Intel bootable array you'll need a third party bootable Raid card to install them in.
...

QVL is for memory that works.

Why add bad memory to QVL?

Don't care where it sells.

As a bit of trivia I have an Asus Hyper X16 installed in my machine with four different OS drives installed on it. The motherboard has no opinion on the location of the OS as long as it finds one to...

Even my Apex with a 7900X and it's 8 NVME drives has better overall performance with HT disabled.

I studied the Dominus when it was released and discovered it's a monster Xenon crippled by the...

Try here:
https://rog.asus.com/motherboards/rog-strix-series?FilterLevelTagId=103&tagID=429&items=

Both boards have a dedicated Bios update port on the back panel along with a detailed instruction section in the manual with a pretty picture of the ports.
I do agree thought it is the user's...

I keep a small FAT formatted USB stick set aside just for bios updates. It is USB 2.0, slow, and works every time. You could install an extension cable on the update port to make it accessable.
...

Downloaded, renamed and copied to USB in Bios slot. Shut machine down, pushed button until flashing and took a break while loading. Damned difficult procedure, required thought.

I use the V2 to hold 4 drives with individual OS's on them. The other 4 drives on my Apex contain data and gaming with 13TB between the 8 drives.
Only my NAS boxes use Raid.

I purchased their 7101 planning to use it for holding multiple OS drives. It locked up and corrupted my main drive. I sent it back to them with instructions that if it tested OK then save me the...

Would new firmware turn my Dime into a Quarter?

Reset the motherboard to Defaults in Bios and start over.

What CPU/RAM ?

You could get the Asus Hyper X 16 V2 card and just add another drive or 4.
I run 8 NVME on my Apex for 13TB on board and zero Sata drives.

You said it worked ok before you put it in the new case. Step back and test it out of the case. 40 years of computer repair on my part means it is a professional suggestion and logical...

Since your problems started with the new case then remove the motheboard from the case and test again.

All of my boot drives (3 Win, 1 Linux) are on the Hyper V2. The 4 on the Apex M.2's are gaming/data drives. I don't keep games on the boot drives.
I also renamed the Recycle Bin to indicate which...

The solution is to replace the Sata drives with more nvme's. I have no Sata drives in mine.
Different chipsets, different rules.

Try raising the Dram voltage. Had to bump my Apex to 1.39 to stop the 00 on XMP.

The only place you will see it is on the Boot page.
I have an Apex with 8 nvme drives and 4 of them contain different operating systems. They're all on the Boot page, nowhere else.
Oh, and in...

According to your manual the Extreme does not support 32GB Dimms, only up to 16GB.