Solving WD SN850X 2TB write performance drops in PUBG
Right in the final circle, after about two hours of play, the game would just hard-lock and crash. It's an absolute joke of a performance cliff. Once the WD SN850X cache fills up, the write speed plummets from 6000MB/s to a pathetic 800MB/s, creating a massive I/O bottleneck when the game saves temp data. I tried lowering the graphics settings, but the write speed kept dropping regardless—it was a hopeless situation. I finally forced a full-drive TRIM operation and locked the virtual memory to 16GB to stop the drive from being hammered by tiny writes. Resource Monitor showed the write latency peak stabilizing at 25-35ms, and the crashes stopped entirely. I did notice a temp spike of 8°C right after the TRIM, so I had to add a beefier heatsink to bring it back to 40°C - 48°C. I backed up the optimization parameters via a system snapshot, and the input response now feels perfectly snappy.
