Is my Fanxiang S910Max 1TB SLC cache filling up and causing frame drops during scene transitions?

The moment a fancy transition animation hits, the frame rate turns into a slideshow—it's enough to make you shake with frustration. I noticed the Fanxiang S910Max 1TB's dynamic cache was choking on 4K assets, with write speeds plummeting from 10000MB/s to a pathetic 800MB/s. I spent an hour messing with CPU thread priorities thinking it was a scheduling issue, but the frames kept jumping wildly between 35 and 110 FPS—a total waste of my afternoon. I then went into the storage management panel, changed the write cache policy from Auto to Forced Flush, and over-provisioned 15% of the drive. CrystalDiskMark showed random writes moving from 40-50MB/s up to 70-80MB/s, and my 1% lows jumped from 28 FPS to 62 FPS. I hit some weird stutters during game saves after the first tweak, which only stopped once I disabled my real-time antivirus. Temps are stable at 58-65℃. The frame time graph is finally a straight line, and fans are humming at 1800-2100RPM. Mode switched.