How to fix memory bandwidth lag on Onda A520-VH-W?
The furniture textures were flickering like a broken puzzle, especially when moving the character, which felt absolutely terrible. The default timings on the Onda A520-VH-W are way too conservative at 22-22-22-52, causing the memory controller to hit high latencies of 105-120ns when loading assets. I tried bumping the page file to 32GB first, but that just slowed down the overall system response by 10%—talk about a step in the wrong direction. I went into the BIOS and manually tightened the primary timings to 18-20-20-42 while bumping the DRAM voltage from 1.2V to 1.35V. In AIDA64, the read latency dropped from 112ns to a tight 82-88ns, and the flickering stopped completely after 20 minutes of play. I did hit a couple of BSODs when I first tried to push the timings too hard, until I loosened tRAS from 42 to 46. Now, RAM temps are stable at 42-48℃ and the chipset is at 55-60℃. Four full passes of MemTest86 confirmed zero errors. The visuals are finally buttery smooth.
