How to fix PCIe bus congestion on ASRock A320M-HDV R4.0?
Every time I snapped the camera, I'd see these anxious jagged tears on the edges, which is super distracting in the Definitive Edition. The PCIe 3.0 lanes on this old ASRock board were hitting a wall with high-res textures, showing data transfer delays of 15-22ms. I tried enabling Low Latency Mode in the drivers, but it was just a band-aid and the tearing stayed—totally frustrating. I jumped into the BIOS, forced the PCIe speed to Gen3 instead of 'Auto', and nudged the BCLK to 101MHz to align with the memory clock. Monitoring with RivaTuner, the frame time jitter dropped from a wild 12-35ms to a tight 8-14ms. I had a brief scare where the SSD wasn't recognized after the BCLK change, but switching the SATA mode back to AHCI fixed it. CPU is running at 62-68℃ and the chipset is at 50-55℃. The bandwidth choke is gone and the controls feel way more responsive.
