How do I fix slow map loading in Rainbow Six Siege on MSI B450M?

During Rainbow Six Siege map switches, my MSI B450M's NVMe SLC cache overflow caused write speeds to plummet from 5000MB/s to below 600MB/s. I tried setting virtual memory to half the disk space, which worsened read/write conflicts. Using GamePP NVMe Queue Config, I increased the queue depth from 1024 to 2048 and enabled forced write cache refresh. 4K random read speed improved to 65-70MB/s per CrystalDiskMark. Load time shortened to 4s, and disk temperature stabilized at 45-52℃. This switch finally restored smooth loading.