How to fix I/O stuttering on Soyo SY-Yanlong B550M?
Walking through those dim tunnels was a nightmare; the screen would just freeze for a few milliseconds, which is incredibly jarring when ray tracing is cranked up. I noticed my Soyo SY-Yanlong B550M M.2 slot was hitting random read latencies of 18-26ms during heavy texture streaming, basically choking the CPU's instruction queue. I tried switching to the Ultimate Performance power plan in Windows, but that just pushed my core temps up to 84℃ without fixing a single stutter—totally useless. I eventually dove into the BIOS and forced the PCIe link speed to Gen4 instead of leaving it on Auto, and disabled the Link Power Management for the SSD. Checking the frame time graphs, the wild swings of 28-52ms smoothed out to a steady 16-21ms. I did hit a snag where the system took forever to boot after locking the link due to a compatibility quirk, but a BIOS firmware update sorted that right out. Now the chipset stays cool between 46-53℃, and the frame delivery is finally rock steady at 16-21ms.
