Experiencing annoying instruction delays and FPS drops in city areas in Metaphor: ReFantazio; how do I fix this lag?

Every time I stepped into a busy town, the game would just hitch, and the anxiety of those random stutters made exploring the world a chore. The factory 36-36-36-76 timings on my Gloway Celestial Strategy DDR5 6000 were producing 72ns - 78ns of latency, which is a death sentence for AI-heavy city scenes. I tried lowering the render resolution, which gave me maybe 8 more FPS, but the input lag was still there—a complete waste of time. I went back into the BIOS and aggressively pushed the timings to 30-34-34-68 and tweaked the SoC voltage to 1.2V. AIDA64 latency plummeted from 75ns to 62ns - 66ns, and the game finally felt snappy. I almost bricked my boot sequence trying 28-28-28, resulting in a boot loop until I relaxed tRAS to 72. RAM temps are stable at 56℃ - 61℃, meaning the heatsinks are doing their job. The in-game performance overlay shows frame times are now a consistent 5.1ms - 6.4ms, though the SoC voltage is right on the edge of stability.