Corsair Vengeance RGB v8.35 4x8GB won’t boot on B550 Gaming X v2

Having reached the limits of my English on other platforms, I came across the forum here and hope someone can help me.

I downloaded the latest bios update (FCC) on my B550 Gaming X v2 yesterday and noticed that I had no chance to play Call of Duty MW2. (crash upon crash)

After I deactivated XMP everything went smoothly. But I don’t want to keep running at 2133MHz when I paid for 3600MHz. The system itself, for example, Sims 4, turned on without any problems.

I tried to go down to 3550, 3450 by overclocking AMD (in bios). The computer turns off and after 3-5 minutes I get the message: “Bios is set to default”. You have previously activated XMP again. I’m worried the reset won’t work next time and I’ll need a new motherboard. – I left the rest on “auto” so this stuff gets taken over by the XMP profile.

what can i do? New RAM. Version 8.35 In general, I have never done anything like this and just played with Mhz in the bios.
But why does the whole system crash when I manually “underclock” it? Bios repeats itself every time.

I am attaching pictures of my settings.

regular:

Ryzen 7 5800X
RX 7900 XT