Why does Battlefield 2042 drop to 60 FPS with Asgard Snow DDR5 6400?

I was thrilled that 6400MHz RAM could handle the scale, but then frames plummeted from 110 to 60 during firefights. I tried High Performance mode in the driver panel, but it didn't help the memory scheduling and just raised CPU temps by 4℃ per HWiNFO64. I used the GamePP Resource Scheduler to maximize I/O priority to Highest and synced the power plan. RivaTuner showed frame times stabilized at 11-17ms, AIDA64 measured 65-105ns latency, and HWiNFO64 confirmed memory temps at 54-60℃.