How to fix VRAM scheduling on Sapphire RX 7650 GRE?
Whenever I trigger those flashy combo attacks, the VRAM usage on my Sapphire RX 7650 GRE jumps wildly between 7.2GB - 7.8GB, causing these brutal 10 FPS stutters that are just infuriating when the specs should be plenty. I first tried lowering the texture filtering, but that just made the game look like mud and didn't fix the lag at all. I eventually went into the driver panel and manually set the shader cache to 'Unlimited,' which slowly brought the frame times down from 35ms to about 16-22ms. Even then, there were these tiny hitches until I locked my system virtual memory to a fixed 16GB range; that's when the VRAM swapping actually calmed down. My GPU core stayed around 64℃ - 70℃ with the fans humming at 1300 RPM. After comparing the throughput across different cache modes, the random read latency dropped significantly, and my frame times finally locked in at 16-22ms. It was a bit of a headache, but it works.
