Why does the Vastarmor RX 9060 XT 16GB hit memory addressing lag and drop frames in forests?

While exploring the woods outside Novigrad, I noticed my frame rate swinging wildly between 80 and 45 FPS, which felt absolutely jarring. Even though the Vastarmor RX 9060 XT 16GB has plenty of VRAM, HWiNFO showed memory bandwidth utilization fluctuating between 65% - 72% with constant page swapping. I first tried enabling Enhanced Sync in the drivers, but that was a disaster; input lag spiked to 35ms, making the game feel like I was wading through mud. I eventually dove into the registry and bumped the virtual memory page size from 4KB to 64KB while flushing 8GB of shader cache. Using RTSS, I saw frame times tighten from a messy 12-25ms down to a rock steady 11-14ms. I actually tried setting the page size to 2MB at first, but the game just crashed at the loading screen, so I backed it off to 64KB. Core temps stayed around 66-71℃ with fans at 1600 RPM. GPU-Z confirmed the memory clock was locked at max, keeping the experience smooth, though the registry tweak was a total pain to figure out.