Fixing Fanxiang S790 4TB interface conflicts in Ratchet & Clank
Whenever I trigger a fast jump, there's this tiny but noticeable lag in the controls, which makes fast-paced combat feel sloppy and imprecise. After digging in, I found the Fanxiang S790 4TB's M.2 lane was sharing southbridge resources with the USB 3.0 ports during full load, causing constant IRQ conflicts. I tried swapping M.2 slots, but the lag kept hovering around 20-30ms, which made me really paranoid about the stability. I eventually went into Device Manager, disabled every unnecessary USB root hub, and forced the NVMe controller into maximum performance mode. In LatencyMon, the peak latency dropped from 1600μs to around 400μs, and the response time felt snappy again. I actually broke my USB keyboard for a minute after disabling the hubs, but I got it back after reconfiguring the resource mapping table. Chipset is at 42-48℃ and the SSD is 50-56℃. Verified the response times with a lag monitor; interface check is complete.
