I've done some searching and have seen some XMP issues with the 19XX BIOS but I haven't seen mine specifically so I'm hoping it's alright to start a new thread on this.
I originally tried turning on XMP while on the 1802 BIOS and my PC would always crash when loading Windows instantly. I finally decided to update to 1903 (I'd seen online where this would fix the BSOD). The update ran fine and was able to boot with XMP on. I played a few games and started getting crashes in game so decided to just keep XMP off and forget about it. Well, when I turn XMP off my motherboard boots into safe mode. I've tried resetting the CMOS as well as flashing two other BIOS versions (1902 and 1802) but if I attempt to turn XMP off now, I can't boot into Windows due to the motherboard booting into safe mode no matter what BIOS version I'm on. I've spent the last couple of weeks dealing with Asus support (most of the time waiting for call backs that never come) and they just want me to RMA the board. I really can't go without my PC for weeks and I can't pay the advanced exchange right now (around $300). I'm waiting for their level 3 support to call me back but I'm not hopeful. Has anyone else run into this issue before? It seems Asus has terrible problems with XMP.
Strix Z390 Gaming-E
Corsair Vengeance PRO RGB 4x8GB DDR4