Why is there micro-stuttering while riding in Where Winds Meet?

I was honestly anxious; watching the distant mountains move with slight jerks on 64GB of RAM felt unbelievable. I tried enabling Ultimate Performance mode in Windows, but besides the fans ramping up to 2200 RPM per HWMonitor, the stuttering didn't budge. I used the GamePP Memory Controller Load Monitor to tighten primary timings to 30-36-36-76 and bumped voltage to 1.4V per CPU-Z. Memory latency dropped to 65-72ns per AIDA64, and temps stabilized at 44-50℃ per AIDA64, making the ride perfectly smooth.