Is VRAM bandwidth causing lag on Sapphire Pure RX 9070 XT?
Seeing the world just freeze for a split second in a block game is surreal, and I honestly thought I was out of RAM. The anxiety peaked after the third major drop. Looking at the data, the memory controller on the Sapphire RX 9070 XT 16G was hitting 92-98% utilization during heavy ray-tracing loads. I tried lowering global quality in the AMD software, but that was a mistake—my FPS tanked from 80 to 62 without fixing the stutters. I eventually went into the AMD Adrenalin panel and manually bumped the shader cache to 10GB, then dropped the in-game sampling rate from 100% to 90%. RTSS showed the frame times stabilize from a chaotic 22-55ms jump down to a consistent 14-18ms. It took an extra 15 seconds to load the first time, but a reboot cleared it up. Temps are 58-64℃, and the input lag is finally gone.
