same here and i got 64gb ram, 4090 msi external cooler liquid supreme, and amd 9 9950x3D for cpu
P.S. / EDIT:
i found out it was issue with my ram being overclocked it somehow got oced to a 6400 idr ever doing that, but i set it to 6000. i was having weird issues with my pc since last week. but all in all the source of my issue was ram config. bf6 open beta appears to be working for me now without issue no crash. was odd tho bc of the ram issue i would get similar errors to you guys. now i dont know 100percent yet if my pc is back to "normal." There are some bsod issues i was having during that week that were unrelated to bf6 liker hyperadviser, attempted to write to read only memory, system service exception, kmode exception not handled" with other apps and also games like broken arrow were crashing without error messages. i want to state i wasnt having any issues with the programs or games etc i was using the week prior. all in all im confident that somehow the ram just got oced (i kinda have an idea of how) . im posting this b/c maybe the errors i would get being the same u guys had for this game might give yous an idea to look at your ram too. run memtest86 etc. it is just an idea. i know that the issue wont be ram for everybody, but we cant rule out the possibility.
