Z890 Extreme / 285k with Corsair Cudimm 8400 XMP?

A while ago (maybe 2-3 months), I tried these Corsair memories: CORSAIR Vengeance RGB DDR5 CUDIMM 48GB (2x24GB) 8400MHz CL40-52-52-135 1.4V No issues without XMP, but once it was enabled, I had game crashes. So I tested my sticks with MemTest, and...