Why does Space Marine 2 drop from 90 to 40 FPS with Corsair RAM?

Fighting thousands of Tyranids was a nightmare; my frame rate suddenly plummeted from 90 to 40 FPS, making combat feel choppy and unresponsive. I tried enabling High Performance mode in the Windows Power Plan, but while CPU clocks rose, the bandwidth bottleneck remained. I eventually used the GamePP Resource Scheduler to set the game process to Realtime priority. RTSS showed frame times converged to 11-16ms from 15-42ms, and HWiNFO64 confirmed fan speeds stayed stable at 1400-1600RPM.