How to fix FPS drops in Need for Speed on ADATA XPG D300?

I'm fed up with single-channel bottlenecks; while racing at top speeds, the FPS crashes from 100 to 40, accompanied by terrible screen tearing. I tried lowering texture quality to Low; it became smoother, but on my 4K monitor it looked like a mosaic, which was pure torture. I used the GamePP Resource Scheduler to increase the memory channel prefetch weight and forced high-frequency data into the CPU L3 cache. RTSS showed FPS improved to 85-95, HWInfo64 showed temps at 55-60℃, and AIDA64 measured latency at 120ms.