Why does Tomb Raider stutter with YMTC Zhitai Ti600 2TB during scene transitions?

In Tomb Raider, write speeds dropped below 500MB/s when the SLC cache filled up. I tried adjusting virtual memory, but it made things worse. I then used GamePP NVMe Queue Depth Configuration to increase depth from 512 to 1024. CrystalDiskMark showed 4K random read improving from 35-42MB/s to 55-62MB/s, allowing me to set a stable loading environment.