Why are buildings loading slowly in PUBG with Western Digital SN850?

Landing in Pochinki, buildings appeared as pixelated blocks one by one; this loading lag is simply lethal in a survival game. I tried increasing virtual memory to 32GB, but this actually worsened the disk read/write conflicts and increased stuttering, which was disheartening. Using the GamePP Resource Scheduler, I set the disk I/O priority to Highest and disabled Windows Search indexing. RivaTuner showed frame time spikes dropped from 60ms to 22-28ms, and HWMonitor confirmed temps at 45-52℃.