How do I fix texture loading errors in Horizon on a Fanxiang S790 1TB SSD?

Riding through Rose Town, the distant mountains looked like pixelated blocks. I tried increasing the page file, but FPS dropped from 78 to 61. I used GamePP to lower timings to 36-38-38-72. AIDA64 confirmed latency dropped from 102-115ns to 76-82ns, and the textures finally loaded correctly.