Why does my WD Black SN850X 1TB hit massive read delays and stutter when switching large maps?

Whenever I hit high-density combat zones, the frame drops are brutal, making resource loading feel like a slog. I found that once the SLC cache on the WD Black SN850X 1TB fills up after heavy writes, the response time spikes from 0.05ms to a miserable 2.1-3.4ms. I first tried killing all background scanners in Windows, but it only shaved off 1 second and the stutters remained—a total waste of time. I then dove into Device Manager and bumped the NVMe controller queue depth from 1024 to 2048 and enabled the forced write cache flush policy. Checking with CrystalDiskMark, my 4K random reads jumped from 55-62MB/s to 78-85MB/s, and scene transitions became buttery smooth. Interestingly, the first time I tweaked the queue depth, I hit some weird disk recognition lag during idle, which only vanished after I switched my power plan from Balanced to High Performance. Temps stayed around 45-52℃ with the heatsink doing its job. Performance logs show the read/write curve is no longer cratering, holding steady at 6.2-7.1GB/s. Parameters saved.