How to stop Fanxiang S790 4TB from lagging in The Hunt?
Watching my frame rate tank from 120 FPS to 25 FPS in a split second is absolutely brutal. This usually happens during heavy real-time asset streaming. Once the SLC dynamic cache on the Fanxiang S790 4TB fills up, the write speed craters from 7000MB/s to below 600MB/s, sending I/O response times from 0.4ms up to a glitchy 25ms - 40ms. I tried clearing system temp files to make room, but that was a joke—it only worked for ten minutes before the drops came back. I realized I had to hit the low-level settings. I went into Device Manager and bumped the NVMe controller queue depth from 1024 to 2048, then enabled the forced write cache flush in Windows performance options. In CrystalDiskMark, my 4K random reads climbed from 42-50MB/s to 65-72MB/s, and scene transitions are now 5 seconds faster. I did hit a snag where the drive had a slight recognition delay during standby after the queue change, but switching power management to High Performance killed that issue. Temps are steady at 45℃ - 55℃. The read/write curves are finally flat, and the system is stable.
