Why does teamfight loading stutter in Dota 2? Is queue depth the issue?

I felt the game freeze just as enemy heroes were repositioning. The Samsung 990 PRO 4TB showed SLC cache exhaustion under load. I tried maxing queue depth to 4096 via BIOS, but it caused buffer overflow and stuttering. Using GamePP NVMe Queue Depth Config, I locked depth to 2048. Per CrystalDiskMark, 4K random read stabilized at 72-78MB/s. Loading lag dropped to 1.1-1.4s. This fixed the issue.