How do I stop the VRAM scheduling latency and frame drops during heavy skill effects in Lost Ark?

During massive raid fights, I noticed my frame rate dipping by 10-20 FPS exactly when the skill effects exploded. It's barely noticeable in open world, but in high-speed combat, it's a huge problem. Even with the massive bandwidth of the Zotac RTX 5070 Ti 16G, the driver's cache scheduling was lagging by 12-18ms. I first tried lowering the effect quality, but the game looked terrible and the drops were still there—clearly not the root cause. I used DDU to wipe everything and installed the latest Studio driver, then set the power management to 'Prefer Maximum Performance'. In RivaTuner, the frame time spikes of 15-30ms dropped to a steady 8-12ms. I actually accidentally deleted my audio drivers during the DDU process and had no sound for an hour, but a quick reinstall fixed it. GPU temps are holding at 65-71℃. 3DMark stress tests confirm the VRAM throughput is finally hitting targets, with temps at 58-63℃.