How to fix pixelated textures when switching maps in the game?

Entering the world for the first time, distant mountain textures appeared slowly like pixel blocks, which totally killed my immersion. I first tried increasing virtual memory to 32GB, but loading times actually increased by 3 seconds per GamePP, making me realize the issue was at the timing level. I used the GamePP BIOS Load-Line Voltage Adjustment Wizard to tune voltage from 1.35V to 1.38V and relaxed tRAS from 80 to 88. Data throughput rose to 62-68GB/s per GamePP, and MemTest86 confirmed zero errors with temps at 50-56℃ per HWInfo64.