GOOD NEWS FOR ME ! CTD are completely gone for me ! From unplaybale game, I’m now … very busy 
Those are the magic settings that changed my life, deeply hidden in my BIOS. Sorry I didn’t reverse them one by one to find the faulty one … 
but I suspect the XMP to be the good candidate.
My MB : Gigabyte Z790 Aorus
Loaded with :
i9-13900k(new one from Warranty)
32 Gigs ram
Samsung SSD 990 pro (2 times now)
RTX 3070 Ti
MSFS2024 is now working either from a dedicated freshly Windows11 installed only for the game on my second ddisk (was part of my try to identify any faulty component) or my normal partition without any crash since hours. I even have re-enable realteck embedded sound device on the MB after, also without any issue.
Good luck for those who are still looking to remove CTD’s !