How to stop FPS crashing in MGS Delta with ADATA ValueRAM?

During intense battles, my memory usage hit 3.8GB per AIDA64, causing the frame rate to plummet from 60 to 20 FPS. I tried manually setting virtual memory to 16GB in Windows; while it stopped the crashes, the stuttering frequency actually increased, which felt ironic. I used the GamePP Resource Scheduler to set the process to Realtime and killed background update services. Frame generation time converged to 18-25ms per RTSS, with memory temps stable at 40-45℃ per AIDA64.