How to reduce memory latency on the Onda 9D4-DVH board?
Flying across planets was a nightmare because of these micro-stutters that completely killed the immersion. The memory controller on the Onda 9D4-DVH was choking on the asset streaming, with latency swinging wildly between 88ns and 102ns. My first instinct was to drop the shadow quality, but the game looked like a potato and the stutters stayed—totally unacceptable. I went into the BIOS, switched the memory profile from Auto to Manual, and tightened the primary timings from 18-22-22-42 down to 16-18-18-38, while bumping the DRAM voltage to 1.35V. AIDA64 showed latency plummeting to a stable 72-76ns, and the fluidity was night and day. It wasn't a smooth ride, though; I hit three boot failures after pushing the timings too hard until I loosened tRAS to 40. Now, the RAM stays cool at 45-52°C. After two hours of continuous play, the hitching is gone, and temps are rock steady at 45-52°C.
