How do I fix the stuttering caused by VRAM bandwidth on a Sapphire RX 7800 XT in Cities Skylines?

Zooming out to a full city view and seeing the progress bar freeze at 90% is a total nightmare—it felt like I was back in the DDR2 era. The Sapphire RX 7800 XT 16G just couldn't handle the massive amount of vertex data, with I/O latency hovering between 95-110ms. I tried switching to the High Performance power plan, but that did absolutely nothing for the read speeds, which made me realize the cache was the real culprit. I went into the AMD Adrenalin panel, flushed 8GB of shader cache, and locked my virtual memory to 32GB. CrystalDiskMark tests showed the latency finally dropping to 75-85ms. I actually had two boot failures during the process, which was a panic moment until I reseated the GPU and cleaned the gold pins. Core temps are stable at 62°C - 68°C, and VRAM is hitting 78-85°C. The internal profiler shows load times dropped by 5 seconds, but the GPU still runs pretty warm.