How to fix VRAM bandwidth stuttering on the RTX 5090 D?
Whenever the game loads massive texture assets, the frame rate would plummet from 120 FPS down to 60 FPS instantly, which completely broke the immersion. Even with the 24GB GDDR7 on this Manli 5090 D, the memory controller was having tiny sync issues at stock voltage under extreme 8K loads. I wasted some time bumping my virtual memory up to 64GB, but that did absolutely nothing for the VRAM bandwidth—the drops kept happening, and it was honestly driving me crazy. I eventually went into the tuning panel and bumped the memory clock offset to +200MHz and added a 0.02V core voltage offset to keep things stable. In side-by-side tests, my 1% lows jumped from 55 FPS to 82 FPS. I did notice VRAM temps spiked to 88°C immediately after the overclock, so I had to set the fan curve to trigger at 60°C to keep it under control. VRAM usage is now steady between 18GB - 22GB. Performance analyzer shows the jitter is gone, and the controls finally feel responsive again.
